US20080055149A1 - Ground-based collision alerting and avoidance system - Google Patents
Ground-based collision alerting and avoidance system Download PDFInfo
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- US20080055149A1 US20080055149A1 US11/977,852 US97785207A US2008055149A1 US 20080055149 A1 US20080055149 A1 US 20080055149A1 US 97785207 A US97785207 A US 97785207A US 2008055149 A1 US2008055149 A1 US 2008055149A1
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- transmitter
- avoidance system
- collision alerting
- obstacle
- collision
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/04—Anti-collision systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/064—Two dimensional planar arrays using horn or slot aerials
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
- H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
Abstract
A collision alerting and avoidance system is presented herein. The system comprises at least one antenna array disposed on a structure on the ground and at least one transmitter/receiver probe coupled to the antenna array. The transmitter/receiver probe operates in a transmit mode to transmit electromagnetic waves and in a receive mode to receive an echo signal reflected from an obstacle in the area of an aerial vehicle. The system also comprises at least one transmitter/receiver module coupled to the transmitter/receiver probe. The transmitter/receiver module operates in a transmit mode to produce electromagnetic waves for transmission and in a receive mode to receive the echo signal. The system also comprises a processor coupled to the transmitter/receiver module. The processor controls transmission of the electromagnetic waves from the antenna array and processes the echo signal to provide an output signal containing information regarding the obstacle.
Description
- This application is a continuation-in-part of and claims priority to NonProvisional patent application Ser. No. 11/266,031, entitled “Collision Alerting and Avoidance System” filed on Nov. 2, 2005, which claims priority Provisional Patent Application Ser. No. 60/624,982, entitled “Collision Avoidance System” filed on Nov. 3, 2004, the disclosures of which are incorporated herein by reference in its entirety.
- In conditions of crowded air traffic and/or low visibility, it is necessary that the pilot of one aircraft be warned of the presence of a nearby aircraft so that he may maneuver his aircraft to avoid a disastrous collision. Systems known as TCAS (Traffic Alert and Collision Avoidance System) employ an interrogator mounted on a commercial jet aircraft and transponders carried by each aircraft it is likely to encounter. In this way, an interrogation is communicated by secondary radar between the aircraft carrying TCAS and other threat aircraft in the vicinity. This is done so that an enhanced radar signal is returned to the TCAS-equipped aircraft to enable its pilot to avoid a collision. The transponder also encodes the returned radar signal with information unique to the threat aircraft on which it is installed. With TCAS, the burden is on the pilot of the TCAS-equipped aircraft to avoid a collision when an alert is received.
- These systems however are very complicated and very costly and are used primarily on large commercial aircraft and required on all aircraft with more than 31 seats operating in the United States. Because of their high cost, these systems are rarely incorporated on smaller, general aviation aircraft, even when they are flying under adverse weather and traffic conditions, a situation which often leads to a collision hazard. General aviation pilots primarily rely on the “see and avoid” practice for collision avoidance and are often even reluctant to incur the cost of installing a transponder without gaining a direct collision avoidance benefit.
- Presently, most unmanned aerial vehicles (UAVs) rely on operations in military restricted airspace to avoid the potential of collision with civilian aircraft. Planned operations in unrestricted portions of the National Airspace System require the ability to “see and avoid” all other air traffic; the same as for manned aircraft. Present air traffic control and TCAS type airborne systems cannot protect UAVs from non-cooperative (i.e., non-transponder equipped) aircraft collision threats. Also there is no present capability for the operator to detect a potential hazard and correct for a potential collision except to keep it in sight from the ground or from a manned chase plane. A primary radar system could provide an equivalent or better “sense and avoid” capability for these aircraft. Further, marine vehicles could also benefit from a system that detects and avoids potential hazards both small (i.e., buoys, logs, etc.) and large (i.e., other ships).
- What is needed in the art is a low cost, reliable, collision avoidance system that is particularly useful to protect against a wide variety of non-cooperative vehicles.
- Referring now to the figures, wherein like elements are numbered alike:
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FIG. 1 is a perspective view of a large winged UAV having an exemplary antenna array of the present invention; -
FIG. 2 is a perspective view of an exemplary antenna array of the present invention; -
FIG. 3 is a perspective view of the individual horns of the exemplary antenna array of the present invention inFIG. 2 ; -
FIG. 4 is a perspective view of a radome enclosing an exemplary antenna array of the present invention; -
FIG. 5 is a block diagram of the system of the present invention; -
FIG. 6 is a side view of a conventional small, tactical UAV having a patch antenna array of the present invention; -
FIG. 7 is a top perspective view of a hybrid system of the present invention disposed on a marine vehicle; -
FIG. 8 is a side view of a ground-based collision avoidance and alerting system of the present invention; and -
FIG. 9 is a side view of another ground-based collision avoidance and alerting system of the present invention. - The following presents a simplified summary of the present disclosure in order to provide a basic understanding of some aspects of the present disclosure. This summary is not an extensive overview of the present disclosure. It is not intended to identify key or critical elements of the present disclosure or to delineate the scope of the present disclosure. Its sole purpose is to present some concepts of the present disclosure in a simplified form as a prelude to the more detailed description that is presented herein.
- The disclosure is directed toward a collision alerting and avoidance system. The system comprises at least one antenna array disposed on a structure on the ground and at least one transmitter/receiver probe coupled to the antenna array. The transmitter/receiver probe is configured to operate in a transmit mode to transmit electromagnetic waves and a receive mode to receive an echo signal reflected from an obstacle in the area of an aerial vehicle. The system also comprises at least one transmitter/receiver module coupled to the transmitter/receiver probe. The transmitter/receiver module is configured to operate in a transmit mode to produce electromagnetic waves for transmission and a receive mode to receive the echo signal. The system also comprises a processor coupled to the transmitter/receiver module. The processor is configured to control transmission of the electromagnetic waves from the antenna array and to process the echo signal to provide an output signal containing information regarding the obstacle.
- A method of using a collision alerting and avoidance system disposed on the ground is also disclosed. The method comprises disposing at least one antenna array on a structure on the ground and coupling at least one transmitter/receiver probe to the antenna array. The transmitter/receiver probe is configured to operate in a transmit mode and a receive mode. The method also comprises coupling at least one transmitter/receiver module to the transmitter/receiver probe. The transmitter/receiver module is configured to produce at least one electromagnetic wave in a transmit mode and to receive an echo signal in a receive mode. The method also comprises transmitting the electromagnetic wave from the transmitter/receiver probe and detecting the echo signal reflected from an obstacle in the area of an aerial vehicle in the transmitter/receiver probe and the transmitter/receiver module. The method also comprises transmitting another electromagnetic wave from the transmitter/receiver probe and the transmitter/receiver module upon receipt of the echo signal and processing the echo signal in a processor coupled to the transmitter/receiver module to provide an output signal containing information regarding the obstacle.
- Persons of ordinary skill in the art will realize that the following disclosure is illustrative only and not in any way limiting. Other embodiments of the invention will readily suggest themselves to such skilled persons having the benefit of this disclosure.
- The present invention is a collision avoidance system that utilizes an antenna array configured to operate with a “sing-around” transmitter/receiver to detect any obstacle in its field of view. While the invention may be used on commercial and military aircraft of any size, the collision avoidance system is particularly useful in general aviation aircraft, as well as for unmanned aerial vehicles (UAVs), and marine vehicles. For the purpose of this disclosure, two types of UAVs are described: large, winged UAVs and small, tactical UAVs. Both may be either remotely piloted or autonomous. In general, however, most UAVs are remotely piloted with some varying degree of autonomy.
- There are two features of the present invention that set it apart from other radar systems. They are (1) the use of a fixed waveguide horn array, and (2) the use of the “sing-around” method to estimate range rate while maximizing radar information rate. The present invention utilizes an array of fixed, fuselage- or ground-mounted horns, each responsible for covering a particular sector of the surrounding volume (given by a range of azimuth angle, elevation angle and radial distance from the aircraft) such that the field of view can be as high as 4π-steradians out to a range of about two to about seven nautical miles, depending upon the total number of antenna horns used, the local environmental conditions confronting the radar, the type of signal generation and processing used and the radar cross-section of the threat aircraft. The azimuth and elevation angle coverage of each sector is dependent on the antenna design and the number of horns employed. The radial range of coverage is dependent on the power, pulse duration and repetition frequency. Each horn is connected to at least one independent transmitter and receiver (T/R) module.
- The present invention employs a “sing-around” control processor that synchronizes the T/R module to provide both radial range and range-rate to any threatening obstacle in its field of view. The “sing-around” method utilizes a constant pulse repetition frequency (PRF); however when a potential obstacle is detected in a particular range-cell, the return pulse (or echo of electromagnetic waves) triggers the transmission of the next pulse (or electromagnetic wave) transmission. As the range to the obstacle changes, the “sing-around” method estimates the range-rate by measuring the changing time-delay between return pulses. This reduction in time between pulses provides an accurate estimation of the range-rate and minimizes the impact of the elapsed time on making critical decisions. When the return pulse is superimposed on system noise, the reduced time-between pulses would generally not give a more accurate estimate of range rate. However, when the range is decreasing, as it does in a potential collision, the signal-to-noise ratio (SNR) increases with time. This steady increase in SNR compensates for the effect of noise on the range-rate computation.
- The “sing-around” method allows for the use of relatively inexpensive and small application-specific integrated circuits (ASICs) in the T/R module. The “sing-around” method utilizes deferred decision processing to reduce the false-alarm rate for each channel. The “sing-around” method is able to adjust the PRF for affecting correspondingly rapid increases in information rate on rapidly closing targets.
- As indicated above, the present invention is contemplated for use in general aviation aircraft as well as UAVs. Referring now to
FIG. 1 , a large,winged UAV 10 is illustrated having atop portion 12 mountedantenna array 16 and abottom portion 14 mountedantenna array 18. Although a topmounted antenna array 16 and a bottom mountedantenna array 18 are illustrated and described herein as being used together, it is contemplated that only one antenna, either top or bottom mounted, can be utilized in some applications. Theantenna array UAV 10 such that the horns (seeFIG. 2 ) of theantenna array UAV 10. Preferably, as illustrated inFIG. 1 , and herein inFIG. 4 , the antenna configuration is covered by a low-drag radome - Referring now to
FIG. 2 , an exemplary narrow-bandradar antenna array exemplary antenna array top portion 12 orbottom portion 14 of aUAV 10, or on both. Eachantenna array equatorial horn 24, at least one 45-degree horn 26, and at least onepolar horn 28. In a preferred embodiment, thehorns polar horn 28 in order to transmit and receive electromagnetic waves from all possible angles in order to detect obstacles. In a preferred embodiment, both thetop antenna array 16 and thebottom antenna array 18 are utilized cooperatively. - As illustrated in
FIG. 3 , eachhorn portion 34 opposite awaveguide portion 36. Thehorns UAV 10. Referring again toFIG. 2 , in one embodiment, if indicated as necessary, an electromagnetic-field choke 29 can be disposed on the flaredportion 34 of the 45-degree horn 26 as a possible means to decouple the 45-degree horn 26 from the nearestequatorial horns 24 and to reduce interference between thehorns - As illustrated in
FIG. 3 , the interior 30 and theexterior 32 of thehorns equatorial horn 24 is a passiveparasitic probe 37 and a T/R probe 38, within theinterior 30 of the 45-degree horn 26 is a T/R probe 40, and within theinterior 30 of thepolar horn 28 are multiple T/R probes 42, 44, 46. Each of these T/R probes 38, 40, 42, 44, 46 is connected to an individual radar T/R module 48 (illustrated only for T/R probe 38 in equatorial horn 28) viacoaxial connectors equatorial horn 24, acable 60 couples thecoaxial connector 50 with the radar T/R module 48. - Although a total of nineteen
horns horns - The
horns horns portion 34 or into thewave guide portion 36. It is contemplated that the conductive metal coating can also be disposed on the edge of the flaredportion 34 and can extend to a portion of the exterior of the horn. -
FIG. 4 illustrates a perspective view of anantenna array 16 partially covered by a low-drag radome 20 in order to show theantenna array 16 beneath theradome 20. The low-drag radome 20 serves to reduce aerodynamic drag while protecting theantenna array 16, without interfering with the operation of theantenna array 16. In use, theradome 20 completely covers theantenna array 16. - As indicated above, the
exemplary antenna 16 has nineteen horns. In this embodiment, there are a total of 20 channels for transmitting and receiving microwave signals (i.e., one per equatorial horn, one per 45-degree horn, and two for the polar horn). In order to adapt to other preferred ranges, the exemplary antenna array can be modified to have any number of horns. However, it is preferred to utilize twoarray antennae - In use, each
horn horn adjacent horns edge 62 located immediately adjacent to its associatedprobe 37. By detecting the echo of the adjacent horns as well, the collision alerting and avoidance system can use “angle interpolation” to more precisely determine the location of a threat aircraft (not shown). The comparison of the relative strength or phase of the received echoes of electromagnetic waves in two adjacent horns is an indication of the direction of the target in relation to the two receiving horns. -
FIG. 5 illustrates a block diagram of the collision alerting and avoidance system. In this embodiment, anupper antenna array 64 is utilized in conjunction with alower antenna array 66. Eachantenna array R module 68 as described above and illustrated inFIG. 3 . The radar T/R module 68 transmits and receives electromagnetic waves through the T/R probes. The T/R probes, when in the transmit mode, operate to drive simultaneously in phase all thehorns antenna array - The
radar module 68 is electrically coupled to asignal processor 70 and acontroller 72. Thecontroller 72 decides when to transmit an electromagnetic wave from the individual microwave transmitters, based upon information received from the signal processor. When the signal processor identifies a potential target, the controller enters into “sing-around” mode, as described above. Thecontroller 72 is connected to an existing audible and visualindicator display unit 74 mounted in the cockpit within the pilot's normal field of view. As such, the display unit is readily visible to the pilot without obstructing his normal forward view. In another embodiment, thecontroller 72 is connected to an existing audible andvisual indicator unit 74 in a ground control station. The ground control station may be operated by an air traffic controller or by a remote pilot of an unmanned aerial vehicle. In other embodiments, thecontroller 72 can be coupled to theflight control system 76, which can display information on an existing cockpit multi-function electronic display. Other electronics can be used to monitor the range and the range rate of each tracked target and calculate the ratio of these values to provide aural and visual alerting to potential collision threats. - In a preferred embodiment, the antenna array of the present invention can be mounted on an aerial vehicle and its re-transmit cycling almost immediately following after each receive cycle may be controlled by a digital clock and a counter/clock-pulse synchronizer, which is the central element in a “sing-around” feedback loop. In this way, the threat-aerial vehicle information rate may be closely matched to the threat-aerial vehicle's relative closure rate. In its quiescent mode, the clock feeds timing pulses to the pulse modulator at a minimum pulse repetition range consistent with a desired radius of a “sphere of safety” around the aerial vehicle. Pulses from the modulator are then fed to a power amplifier/oscillator, which is tuned to one of certain microwave frequencies.
- It is contemplated that the collision alerting and avoidance system can be operated in two embodiments. The first embodiment supports a collision and terrain alerting, as well as ground proximity warning for use as an affordable way of autonomously providing safety for a broad class of general aviation aircraft. This embodiment utilizes a power amplifier/oscillator that drives the T/R probes of the antenna array. When in the threat-target acquisition transmit mode, the T/R modules operate to drive every horn simultaneously without phase coherency being maintained between all sectors, which thereby transmit electromagnetic waves around the antenna array and the aerial vehicle. This lack of phase coherency results in the reduction of potential adjacent electromagnetic wave interference during the post-detection integration process. Once the “sing-around” mode is initiated, after the threat-target acquisition, simultaneous transmission is perturbed in that channel (or channels), which, respectively, has or have acquired a threat target or threat targets, so that averaging reduced through the consequential reduction in the number of pulses subjected to post-detection integration is compensated by the associated lack of pulse-repetition synchronism; thereby, also avoiding electromagnetic wave interference.
- The second embodiment is intended to support collision, terrain and ground-proximity avoidance for UAVs through an automatic flight controller. In addition to methods described in the first embodiment, phase coherency is needed between transmitted pulses and transmitted pulses transmitted on adjacent channels. This is accomplished by utilizing phase comparison (or logarithmic-amplitude and phase form of sum-difference signal feedback angle estimation loop) and replacing logarithmic-amplitude comparison. Such will be necessitated for improving angle-interpolation accuracy in a manner required for the UAV Detection, Sense and Avoid (DS&A) function; while also providing the degree of phase coherency required to support high resolution, space-time Synthetic Aperture Radar (SAR) ground-surveillance imaging. When phase injection locking is performed to support these UAV requisite functions, there are various forms of desired pulsed-waveform modulation and the attendant signal processing needed to support these functions; while also allowing the use of non-interfering coded pulse transmissions to avoid beam-pattern distortion during simultaneous transmissions, which actions may be facilitated through the use of phase-locked frequency “hopping” coding of “burst” waveforms. In addition, the introduction of phase coherency allows the use of multiple-pulse Doppler or moving-target-indicator (MTI) signal processing techniques for enhancing radar clutter rejection; while also improving radial-range-rate estimation accuracy; but not to the exclusion of the “sing-around method” that also maximizes radar information rate as desired for achieving optimum reaction time.
- When the T/R modules are in a receive mode, any electromagnetic wave reflected off either a threat aerial vehicle, a forward-terrain feature, or the ground below (called threat events) and returning to a corresponding or adjacent sector will be detected by one of a cluster of microwave-radar T/R modules, which is associated with that sector or, for beam-interpolation purposes, an adjacent sector.
- The returning echo of electromagnetic waves will provide return energy that will arrive at one of the receiver sectors close to the Maximum Response Axis (MRA) of the receiver beam pattern of that segment. Beam-angle interpolation will be performed through this and its adjacent channel, both subjected to logarithmic-amplifier compression after which a subtraction of one from the other will provide a close to linear interpolation of angle around the cross-over axis residing between the MRA of these neighboring beams.
- For the non-coherent phase application to general aviation, prior to entering the bi-polar end of a bi-polar to uni-polar logarithmic amplifier, as a preferred embodiment, intermediate frequency (IF) surface-acoustic-wave (SAW) filters are used to improve the signal-to-noise ratio (SNR). These IF SAW filters have also been chosen to allow selection of one of at least two different SAW-filter bandwidths to more closely match a transmit pulse duration that is changed with the “sing-around” pulse-repetition rate so as to approximately maintain a constant pulse duty cycle. After IF filtering, the uni-polar end of each logarithmic amplifier contains detector-diode operations that provide a unidirectional rectified pulsed signal corresponding to a post-detection radar video threat-event pulse. These video pulses are first subjected to a pulse integrator that continues to accumulate multiple pulses for integration over a period determined by its beam-channel related deferred-decision (upper/lower) threshold logic. Potential threat events which exceed the upper threshold are declared as threat-event detections, while their counterparts that fall below the lower threshold are rejected as false alarms. However, the decision is deferred on counterparts which fall between these two thresholds; thereby also requiring that another video pulse be added to the integration process and subjected to retesting by the deferred-decision logic. Converging upper/lower thresholds are employed so as to naturally truncate this process before the decision-making elapse time has become too prolonged.
- A sensitivity time control (STC) amplifier can be employed to reduce the dynamic range stress on the analog logarithmic amplifier and a limited dynamic range analog-to-digital converter. An STC amplifier, whose control waveform is selectively well-matched to various forms of intruding clutter, can reduce the dynamic range of clutter variations. In addition, so as to maintain a constant false alarm probability (CFAP), a fast time constant (FTC) filter or, instead, through the enhanced action of an iterative digital-processing counterpart can be employed. This is applied as a post-detection process after the logarithmic amplifier has compressed noise fluctuations to a constant standard-deviation level. The purpose of this logarithmic-amplifier/FTC filter combination is to remove any slowly time-varying mean of the clutter variations about which this logarithmically compressed fluctuating noise-waveform and any video-signal (that is subsequently passed by the FTC filter) occurs. While, at the same time, the almost pulse-duration matched IF SAW filter selected serves to limit both the clutter and the, otherwise, wide-band thermal noise to roughly the same bandwidth so that the CFAP action also translates into the constant false alarm rate (CFAR) action desired by most radars. The false contact rate (e.g., from clutter or other echoes) is further reduced by use of a split range gate that indicates when a video signal, that has exceeded its respective threshold, exactly straddles between an early and a late range gate window. This is indicated by differencing the area of the portion of the video pulse, where area is obtained through short-term integration and that falls in the early versus the late range gate. When the difference indication passes through zero, the center of the video pulse is located. Logic is provided to ensure that the first contact is normally selected. All of these actions provide a way of ensuring that adjacent channel threat-event signals are strong enough via SNR to constitute valid threat-event detection and have been localized by the range gate before the dual logarithmic-amplifier channel amplitude comparisons are made for angle-interpolation purposes.
- Generally speaking, when mounted on an aerial vehicle, the upper sub-array of the antenna array of the present invention is used to make threat-event aerial vehicle detections, validations, (range, range-rate, azimuth-angle, elevation-angle and a tau=range/range-rate time to CPA or encounter estimation), localizations and tracking over the upper 2-pi steradians. Whereas, the lower sub-array provides much the same functions in generating terrain alerts and ground-proximity warnings; while also detecting aerial-vehicle threat events on received echoes which might occur earlier in arrival time than the terrain or ground-proximity threat events. The two arrays can be operated together to provide effective elevation resolution.
- In either the aerial or ground-based system, when one of the sectors detects a threat aerial vehicle and selector ultimately provides a signal, which is processed through a threshold device, and range gate and then passed onto logic circuitry, that first threat contact is selected by that circuitry and a corresponding priority output signal is captured by the “sing-around” feedback loop. Signal is passed to “sing-around” rate counter threshold circuitry, which ensures that a ground-proximity alarm will not be sounded or indicated during a normal landing glide-slope-descent rate situation. A signal is passed from the circuitry to the clock to activate the next “sing-around” feedback loop cycle.
- Each of the signals from the microwave radar modules may override the first threat contact of signal by way of override determination circuitry in logic so conditioned that the output signal is representative of the highest priority threat. For example, if a ground echo were to arrive in one of the channels of the sectors, the highest priority signal (rather than the closest signal in range) selected by logic would be derived from the output signal. In addition, the conditioning logic can facilitate the interleaving of transmit cycles to be associated with another iterated sequence of the “sing-around” subsystem that also captures aerial threat events occurring as an earlier echo arrival in the receiver.
- The “sing-around” rate control/threshold already has been described above. It is noted that apart from maximizing the information rate in concert with a shortening time to react during the relative closing of a threat target, because radial-range information is implicit in the time between “sing-around” feedback loop cycles, the changes in the PRF of those cycles convey information on relative radial-range closure rate. This latter quantity is an important measure in gauging the imminence of a collision. However, under certain low closure rate circumstances (e.g., the descent rate in approaching ground proximity during a normal glide-slope landing), an audible alarm or a visual warning indication would be distracting. Therefore, by countering and applying a threshold to the rate-of-change in radial range occurring at time information may be derived in order to prevent the “sing-around” feedback loop from being prematurely triggered during benign circumstances. Then, the triggering of a ground-proximity warning, for example, is only affected when logic dictates it is reasonable to consider the event as possibly threatening; otherwise, the controller returns the “sing-around” feedback loop to its quiescent state.
- The aural and visual display symbols are designed to provide the pilot or controller with rapid, unambiguous and clear indications of impending collision situations. The present invention also provides concise information that would enable an immediate autonomous collision avoidance maneuver or sufficient early warning to not only obviate a collision but, also, to facilitate reducing the chance of a near miss. The cockpit speaker can be used to reproduce various audible alarm messages.
- There is a desire to make the present invention compatible with other cooperative collision alerting systems, which may be present on other types of aircraft and aerial vehicles. For example, smaller aircraft lacking a strong radar cross section (RCS) may respond to a transponder interrogation or may provide an Automatic Dependent Surveillance-Broadcast (ADS-B) message with GPS position (if available) and other information useful in rapidly assessing the likelihood of a collision. The antenna array for such may be fabricated as an L-band pair of cross-dipole antenna etched into one or both sides of a sheet of plastic substrate onto which conducting surfaces were bonded. Other T/R module components may have leads etched into the conducting sheet connecting with the antenna with the whole assembly further laminated in a flexible plastic a wrap-around and zip Elizabethan-type collar sandwich. Such a sandwich would be designed to be capable of being opened for insertion and, then, zipped-up into position when settled into a wedge-like space existing in between the equatorial horns and the 45-degree tilted horns. Along with the necessary received interrogation the decoding and message encoding repeater electronics, which may be accommodated with the microwave-radar modules mounted inside of the radome cavity, the sandwich antenna required for this combined mode may be easily accommodated as an upgraded option. In addressing a concern about mutual interference, which would be much less prevalent with the lower microwave power levels associated with a system of the present invention, for example, relative to an L-band full-blown TCAS system, a “whisper and shout” mode might be employed. This “whisper and shout” mode entails the pulsing of the PA/OSC module to radiate lower power during the quiescent mode than would be employed at full power once an alert cycle was being initiated.
- An upgrade to the collision avoidance system can include an ADS-B communications and surveillance link. ADS-B, with the associated broadcast services called Traffic Information Service-Broadcast (TIS-B) and Flight Information Service-Broadcast (FIS-B), can be made available through a C-band or a S-band antenna array of the present invention. The traffic information from such cooperatively-equipped aircraft can be correlated with the present invention's primary radar returns.
- In another embodiment, the present invention is also designed to be utilized on small, tactical UAVs. Small, tactical UAVs are used to detect smaller, close-in fixed targets, constituting obstacles, such as power lines, telephone poles and trees, as well as airborne targets such as other UAVs. In order to detect smaller, close-in fixed targets using the collision avoidance system of the present invention, a higher radial range resolution is required. It is contemplated that an ultra-wide band (UWB) version of the present invention must be utilized for small, tactical UAVs in order to obtain the necessary range resolution.
- As illustrated in
FIG. 6 , a conventional small,tactical UAV 78 is illustrated having anarray 80 of patch-array antenna 82. Although a total of ten patch-array antenna 82 are illustrated, any number of patch-array antennae 82 is contemplated, depending on the precise requirements of the application (e.g., field of view, bearing resolution, etc.). One skilled in the art can determine the proper number of patch-array antenna 82 required for the particular application. - A patch (or microstrip patch)-
array antenna 82 is a microwave antenna, which consists of a thin metallic conductor bonded to each side of a thin grounded dielectric substrate. Each individual patch-array antenna 82 independently operates to transmit and receive signals. When combined with other patch-array antenna, a phased array is formed that is capable of covering a larger multiple fixed-beam coverage area. Patch-array antenna, generally, are utilized when wide band (WB) or UWB band transmission and reception is desired. - The patch-
array antenna 82 may be distributed as aconformal array 80 on the outer shell of theUAV 78 airframe with their microwave T/R components integrated into a package (not shown) mounted immediately behind each patch-subarray antenna module. This is because multiple modes within waveguides or substantial fringe-field losses with long lines ofpatch antenna 82, generally, rule out the WB or UWB use for communicating microwave electromagnetic energy over long lengths between the T/R subarrays groups subarrays array 80 of patch-array antenna 82 can be operated utilizing the “sing-around” method as described herein. One skilled in the art can readily determine the appropriate components for implementing the “sing-around” with the patch-array antenna 82. - In yet another embodiment, the collision avoidance system of the present invention can utilize both narrow-band and UWB versions. The narrow-band version is designed to detect large, distant obstacles, while the UWB version is designed to detect small, close-in obstacles.
- Marine vehicles can be adapted to utilize a hybrid system consisting of both narrow-band and UWB, as illustrated in
FIG. 7 . Ships and boats must be able to avoid collisions with obstacles that have a wide range of scales, from the small (e.g., buoys, small craft, etc) to the large (e.g., other ships). -
FIG. 7 illustrates a top perspective view of thehybrid antenna system 88 of the present invention disposed on theroof 90 of a marine vessel (not shown). Preferably, the exemplaryhybrid antenna system 88 is located up on the highest portion of the marine vessel. Thehybrid antenna system 88 has a plurality ofequatorial horns 92 disposed on acylindrical base 94. Thehorns 92 are positioned in order to allow thehybrid antenna system 88 to perform angle interpolation around the direction of thecenter 96 of this single-sector alignedcluster 98. Most likely, such a marine system would require a ring ofcontiguous horns 92 in order to facilitate 360-degree coverage. Although a total of twelve pyramidal horns are illustrated, with 30-degrees between the maximum response axes of thesehorns 92, any number of horns is contemplated. For example, a cluster of horns can contain eight equatorial horns having a 45-degree spacing to cover all of the “quarter-beam” compass regions around the marine vessel (with sixteen equatorial horns needed to cover all one-sixteenth compass directions). Another example is four equatorial horns to cover the primary compass directions, with the design choice being dictated by a compromise between the desired concept of operations and unit cost considerations. - The
hybrid antenna system 88 also includes a circumferential array of patch-array antenna 100, which is disposed about thecylindrical base 94, following the previously described considerations related to interspersing patch-subarray antenna 100 in between thehorns 92. - The shapes, construction and materials contemplated for the
horns 92 and patch-array antenna 100 are as indicated above. The hybrid system of the present invention is contemplated to operate using the “sing-around” methodology as described herein. Specifically, the hybrid system is contemplated to operate in the 3.65 to 3.70 GHz joint marine/FAA microwave S-band. - It is noted that both the first (non-coherent) embodiment and the second (phase coherent) embodiment of the present invention may be disposed on the ground as part of a ground-based collision avoidance and alerting system. In this embodiment, the collision avoidance and alerting system is disposed on the ground and acts primarily as an alerting system to de-conflict the adjacent airspace. The information generated by the collision avoidance and alerting system concerning the presence of an obstacle in the vicinity of any aerial vehicles is provided to air traffic controllers, remote pilots operating unmanned aerial vehicles, and pilots of manned vehicles. Thus, providing key information to avoid the obstacle. An obstacle is any stationary or moving object with which an aerial vehicle may collide. Obstacles include (but are not limited to) manned aerial vehicles, unmanned aerial vehicles, towers, parachutes, and lighter-than-air vehicles.
- Referring now to
FIGS. 8 and 9 , a ground-based collision avoidance and alertingsystem 102 is illustrated. Thesystem 102 utilizes an upward-lookingarray 104 that is similar to the upward-looking array disposed on the top of an aerial vehicle in the airborne embodiment as described herein. Thearray 104 is mounted on a tower (or structure or housing or a building) 106 that is disposed on theground 108. In a preferred embodiment illustrated inFIG. 8 , a radome 110 (or similar covering) is disposed over thearray 104. Theradome 110 serves to protect thearray 104, without interfering with the operation of thearray 104. - As described herein, the
array 104 can be comprised of an array of horns (FIG. 8 ), patch antennae, or a combination thereof (FIG. 9 ). Thearray 104 is configured to transmit and receive information as described herein. Thearray 104 has appropriate electronics (illustrated as 112) in order to be coupled either physically or remotely to a system (or user) utilizing the “sing-around” technology, as discussed herein. The user can be air traffic controllers, remote pilots operating unmanned aerial vehicles, and pilots of manned vehicles. - In use, the ground-based collision alerting and avoidance system displays the information regarding any obstacle to a ground-based air traffic controller or remote pilot of an unmanned aerial vehicle. The information enables the air traffic controller or the remote pilot to take action to avoid collisions between aircraft operating in the vicinity of the collision avoidance and alerting system.
- As opposed to the previously mentioned examples of aircraft and terrain alerting and ground-proximity warning for general aviation applications, as well as Detection, See and Avoid (DS&A) operation for UAV applications, Synthetic Aperture Radar (SAR) can be used in the context of SAR operations involving high-resolution imagery for ground-surveillance and mapping purposes. Large strategic UAVs are too small to accommodate the physical size of a real microwave aperture required for ground surveillance and mapping. Therefore, in order to form a virtual microwave aperture for the present invention requires resorting to SAR-type transmissions and space-time reception digital recording and processing (replacing the original photographic recording and optical processing) as well as digital image processing. In order to operate a SAR in a focused mode, a form of coded-waveform transmission (usually, a continuous wave, frequency modulated (CT-FM) waveform) is described herein to be consistent with making the radial-range resolution equal to the focused SAR cross-range resolution imagery. Such a form of SAR produces cross-range resolution that is no smaller than half the physical dimension of the transmitting real aperture. This implies that the receiving virtual aperture (or cold aperture) must be governed in the SAR side-looking mode by setting half of the physical dimension of the transmitting aperture equal to the product of the virtual (or synthetic) aperture F-number (i.e., given by the intended maximum radial range of the port or the starboard “swath” coverage divided by the length of the virtual aperture) times the radar wavelength. In other words, the synthetic aperture length needed equals twice the intended maximum radial range (i.e., wherein, ground range is the radial range times the cosine of the elevation angle) times the radar wavelength divided by the cold aperture length. Such a synthetic aperture length is determined by the smaller of the space-time coherency limitation and the accuracy to which a GPS-guided inertial navigation system (GPS/INS) can measure the exact space-time trajectory of the UAV. By way of contrast, instead of utilizing a downward looking broadside-azimuth pointed 45-degree horn to support a SAR side-looking mode, one of the downward looking off-broadside-azimuth pointing 45-degree horns can be used. The consequence is that the synthetic aperture length is foreshortened by the cosine of the azimuth angle referenced to the broadside azimuth angle and, hence, the cross-range resolution is worsened by a factor of the secant of the azimuth-angle offset from broadside. For example, at 65-degrees from broadside, the cross-range resolution is worsened by a factor of 2.37:1; an unfortunate consequence in order to obtain SAR imagery prior to reaching the surveillance area.
- Most of the passive Electro-Optical (EO) and Infrared (IR) designed for DS&A purposes or ground-surveillance imaging system applications installed upon UAVs, do not use stereo-optical systems for determining radial range within the forward Field-Of-View (FOV) (i.e., usually confined to +/−110-degrees of azimuth and +/−15-degrees of elevation). These passive EO/IR systems lack the ability to provide a radial-range, radial-range-rate and tau time-to-CPA or collision point. Most passive EO/IR systems intended to provide both a DS&A as well as a ground-surveillance imaging capability for UAVs use, three contiguous, canted digital camera apertures arrayed to provide coverage in both vertical and azimuthal directions. In a preferred embodiment, a hybrid system can utilize three equatorial pyramidal horns and a one up and one down 45-degree tilted pyramidal horns (i.e., for a total of a five-channel cluster capable of being scanned to any angle in 360-degrees of azimuth). These horns can be co-mounted upon a UAV “chin-mounted” 360-degree mechano-optical rotated table to provide radial range, radial range rate (and, hence, a tau estimate) as well as azimuth and elevation angle. This embodiment allows for the elevation angle to be interpolated to within about a degree of accuracy over the +/−110-degrees of azimuth and the +/−15-degrees of elevation FOV coverage around any scan angle.
- There are several advantages of the collision alerting and avoidance system of the present invention. The present invention utilizes an array of fixed, fuselage-mounted horns, each responsible for covering a particular sector of the surrounding volume (given by a range of azimuth angle, elevation angle and radial distance from the aircraft) such that the total coverage adds up to as high as 4π-steradians in field of view and out to a range of about two to about seven nautical miles. The “sing-around” method allows for the use of relatively inexpensive and small application-specific integrated circuits (ASICs). The “sing-around” method utilizes a single channel per beam for deferred decision processing to reduce the false-alarm rate. The “sing-around” method is able to adjust the PRF for affecting correspondingly rapid increases in information rate on rapidly closing targets.
- The exemplary embodiment for use with general aviation aircraft and large UAVs provides several safety and efficiency benefits. The present invention provides a safety backup for the event of electronics failure on cooperative aircraft (which would make ADS-B unavailable or transponder detectors useless). In the future, when Airborne Separation Assistance System (ASAS) applications are sought using ADS-B, the primary surveillance from the present invention can facilitate the certification of such applications by providing an independent primary radar surveillance mode. The present invention provides an independent primary radar surveillance mode and provides a complete collision prevention function against all aircraft, making use of the best surveillance information available and providing protection against failure modes.
- The collision avoidance system of the present invention utilized with small, tactical UAV encompasses UWB to detect smaller, close-in fixed targets, constituting obstacles. This embodiment provides range, bearing and closure rate, as well as off-to-the-side range rate. All of this is achieved through the use of the “sing-around” design and without the use of expensive and heavy phased array components. The resulting system is expected to be light weight (less than about 10 lb), low power (less than about 10 Watts) and low cost.
- The collision avoidance system of the present invention utilized with marine vehicles encompasses both narrow-band and UWB to detect both small and large obstacles. This provides ample detection area and protection for the marine vessels.
- The ground-based collision avoidance system can be utilized from the ground to project upwards to a specific area of interest. The ground-based system can detect both small and large obstacles. This system is light-weight and portable. The ground-based system provides an independent primary radar surveillance mode and a complete collision prevention function against all aircraft, making use of the best surveillance information available.
- While the invention has been described with reference to an exemplary embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention.
Claims (19)
1. A collision alerting and avoidance system comprising:
at least one antenna array disposed on a structure on the ground;
at least one transmitter/receiver probe coupled to said at least one antenna array, said at least one transmitter/receiver probe configured to operate in a transmit mode to transmit electromagnetic waves and in a receive mode to receive an echo signal reflected from an obstacle in the area of an aerial vehicle;
at least one transmitter/receiver module coupled to said at least one transmitter/receiver probe, said at least one transmitter/receiver module configured to operate in a transmit mode to produce electromagnetic waves for transmission and in a receive mode to receive said echo signal; and
a processor coupled to said at least one transmitter/receiver module, said processor configured to control transmission of said electromagnetic waves from said at least one antenna array and to process said echo signal to provide an output signal containing information regarding said obstacle.
2. The collision alerting and avoidance system of claim 1 , wherein said at least one antenna array comprises at least one of a plurality of horns and a patch array antenna.
3. The collision alerting and avoidance system of claim 2 , wherein said plurality of horns comprises at least one of a polar horn, a 45-degree horn, and an equatorial horn.
4. The collision alerting and avoidance system of claim 1 , further comprising:
a display coupled to said processor for displaying said information to an operator of the collision alerting and avoidance system, said information enables said operator to take appropriate action to avoid said obstacle.
5. The collision alerting and avoidance system of claim 1 , wherein said processor is remotely coupled to a flight control system for processing said information in order to take action to avoid said obstacle.
6. The collision alerting and avoidance system of claim 1 , wherein the collision alerting and avoidance system acts primarily as an alerting system.
7. The collision alerting and avoidance system of claim 1 , wherein a user of the collision alerting and avoidance system is at least one of an operator of an unmanned aerial vehicle, an air traffic controller, and an operator of a manned aerial vehicle.
8. The collision alerting and avoidance system of claim 1 , further comprising:
a radome covering said at least one antenna array.
9. The collision alerting and avoidance system of claim 1 , further comprising:
a plurality of communication links selected from the group consisting of TCAS, ADS-B, TIS-B, and FIS-B, electrically coupled to the collision alerting and avoidance system and configured to operate with the collision alerting and avoidance system.
10. The collision alerting and avoidance system of claim 1 , wherein said at least one transmitter/receiver probe transmits another said electromagnetic wave upon receipt of said echo signal.
11. The collision alerting and avoidance system of claim 1 , wherein said processor is configured to determine a range-rate estimation of said obstacle to said aerial vehicle by varying a pulse-repetition frequency based on said information and to determine a time to closest approach to said obstacle as a ratio of a range to said range-rate estimation.
12. A method of using a collision alerting and avoidance system disposed on the ground comprising:
disposing at least one antenna array on a structure on the ground;
coupling at least one transmitter/receiver probe to said at least one antenna array, said at least one transmitter/receiver probe configured to operate in a transmit mode and a receive mode;
coupling at least one transmitter/receiver module to said at least one transmitter/receiver probe, said at least one transmitter/receiver module configured to produce at least one electromagnetic wave in a transmit mode and to receive an echo signal in a receive mode;
transmitting said at least one electromagnetic wave from said at least one transmitter/receiver probe;
detecting said echo signal reflected from an obstacle in the area of an aerial vehicle in said at least one transmitter/receiver probe and said at least one transmitter/receiver module;
transmitting another electromagnetic wave from said at least one transmitter/receiver probe and said at least one transmitter/receiver module upon receipt of said echo signal; and
processing said echo signal in a processor coupled to said at least one transmitter/receiver module to provide an output signal containing information regarding said obstacle.
13. The method of claim 12 , further comprising:
determining a range-rate estimation of said obstacle to said aerial vehicle by varying a pulse-repetition frequency based on said information; and
determining a time to closest approach to said obstacle as a ratio of range to said range-rate estimation.
14. The method of claim 12 , further comprising:
displaying said information to an operator of the collision alerting and avoidance system, wherein said information enables said operator to take action to avoid said obstacle.
15. The method of claim 12 , further comprising:
coupling a flight control system remotely to said processor for processing said information to enable the aerial vehicle to take action to avoid said obstacle.
16. The method of claim 12 , wherein said aerial vehicle is at least one of a general aviation aircraft and an unmanned aerial vehicle.
17. The method of claim 12 , further comprising:
disposing a radome over said at least one antenna array.
18. The method of claim 12 , further comprising:
electrically coupling a plurality of communication links to the collision alerting and avoidance system and configured to operate with the collision alerting and avoidance system, said plurality of communication links selected from the group consisting of TCAS, ADS-B, TIS-B, and FIS-B.
19. The method of claim 12 , wherein a user of the collision alerting and avoidance system is at least one of an operator of an unmanned aerial vehicle, an air traffic controller, and an operator of a manned aerial vehicle.
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Cited By (180)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080150784A1 (en) * | 2006-12-22 | 2008-06-26 | Intelligent Automation, Inc. | Ads-b radar system |
US20090174590A1 (en) * | 2005-06-01 | 2009-07-09 | Albert Gezinus Huizing | Radar system for aircraft |
US20090248287A1 (en) * | 2008-02-15 | 2009-10-01 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system and related methods |
US20100087967A1 (en) * | 2008-10-03 | 2010-04-08 | Honeywell International Inc. | Multi-sector radar sensor |
US20100315281A1 (en) * | 2009-06-10 | 2010-12-16 | The University Of North Dakota | Airspace risk mitigation system |
US7868817B2 (en) | 2008-10-03 | 2011-01-11 | Honeywell International Inc. | Radar system for obstacle avoidance |
US20120039422A1 (en) * | 2010-08-09 | 2012-02-16 | Stayton Gregory T | Systems and methods for providing surface multipath mitigation |
CN102364553A (en) * | 2011-10-21 | 2012-02-29 | 广州航新航空科技股份有限公司 | Regional airspace management monitoring system based on traffic alert and collision avoidance system (TCAS) |
US20120112957A1 (en) * | 2010-11-09 | 2012-05-10 | U.S. Government As Represented By The Secretary Of The Army | Multidirectional target detecting system and method |
US20120146783A1 (en) * | 2009-05-20 | 2012-06-14 | Stephan Harms | Method for controlling an obstruction light |
US20120158219A1 (en) * | 2010-12-21 | 2012-06-21 | Michael Richard Durling | Trajectory based sense and avoid |
US20120166073A1 (en) * | 2009-09-17 | 2012-06-28 | Serge Poirier | Method and system for avoiding an intercepting vehicle by an airborne moving body |
US20120182175A1 (en) * | 2009-07-14 | 2012-07-19 | Robert Bosch Gmbh | UWB Measuring Device |
US20120203450A1 (en) * | 2011-02-08 | 2012-08-09 | Eads Deutschland Gmbh | Unmanned Aircraft with Built-in Collision Warning System |
US8477063B2 (en) | 2008-10-03 | 2013-07-02 | Honeywell International Inc. | System and method for obstacle detection and warning |
US20140062754A1 (en) * | 2011-10-26 | 2014-03-06 | Farrokh Mohamadi | Remote detection, confirmation and detonation of buried improvised explosive devices |
KR20140076509A (en) * | 2012-12-12 | 2014-06-20 | 한국전자통신연구원 | Antenna apparatus and method for switching baem using the antenna apparatus |
US20140222246A1 (en) * | 2011-11-18 | 2014-08-07 | Farrokh Mohamadi | Software-defined multi-mode ultra-wideband radar for autonomous vertical take-off and landing of small unmanned aerial systems |
US20140303884A1 (en) * | 2012-12-19 | 2014-10-09 | Elwha LLC, a limited liability corporation of the State of Delaware | Automated hazard handling routine activation |
CN104155654A (en) * | 2014-08-13 | 2014-11-19 | 芜湖航飞科技股份有限公司 | Airborne radar |
US9235218B2 (en) | 2012-12-19 | 2016-01-12 | Elwha Llc | Collision targeting for an unoccupied flying vehicle (UFV) |
US20160012731A1 (en) * | 2008-02-15 | 2016-01-14 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US9322917B2 (en) * | 2011-01-21 | 2016-04-26 | Farrokh Mohamadi | Multi-stage detection of buried IEDs |
US9405296B2 (en) | 2012-12-19 | 2016-08-02 | Elwah LLC | Collision targeting for hazard handling |
US9525210B2 (en) | 2014-10-21 | 2016-12-20 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9527587B2 (en) | 2012-12-19 | 2016-12-27 | Elwha Llc | Unoccupied flying vehicle (UFV) coordination |
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US9540102B2 (en) | 2012-12-19 | 2017-01-10 | Elwha Llc | Base station multi-vehicle coordination |
US9544006B2 (en) | 2014-11-20 | 2017-01-10 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US20170033464A1 (en) * | 2015-07-31 | 2017-02-02 | At&T Intellectual Property I, Lp | Radial antenna and methods for use therewith |
US20170033447A1 (en) * | 2012-12-12 | 2017-02-02 | Electronics And Telecommunications Research Institute | Antenna apparatus and method for handover using the same |
US9567074B2 (en) | 2012-12-19 | 2017-02-14 | Elwha Llc | Base station control for an unoccupied flying vehicle (UFV) |
US9577306B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9596001B2 (en) | 2014-10-21 | 2017-03-14 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9608740B2 (en) | 2015-07-15 | 2017-03-28 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9608692B2 (en) | 2015-06-11 | 2017-03-28 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US9615269B2 (en) | 2014-10-02 | 2017-04-04 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9628854B2 (en) | 2014-09-29 | 2017-04-18 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing content in a communication network |
US9628116B2 (en) | 2015-07-14 | 2017-04-18 | At&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
US9640850B2 (en) | 2015-06-25 | 2017-05-02 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9654173B2 (en) | 2014-11-20 | 2017-05-16 | At&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
US9653770B2 (en) | 2014-10-21 | 2017-05-16 | At&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
US9661505B2 (en) | 2013-11-06 | 2017-05-23 | At&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9669926B2 (en) | 2012-12-19 | 2017-06-06 | Elwha Llc | Unoccupied flying vehicle (UFV) location confirmance |
US9685092B2 (en) | 2015-10-08 | 2017-06-20 | Honeywell International Inc. | Stationary obstacle identification system |
US20170178520A1 (en) * | 2015-12-17 | 2017-06-22 | Honeywell International Inc. | On-ground vehicle collision avoidance utilizing shared vehicle hazard sensor data |
US9692101B2 (en) | 2014-08-26 | 2017-06-27 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
US9699785B2 (en) | 2012-12-05 | 2017-07-04 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9712350B2 (en) | 2014-11-20 | 2017-07-18 | At&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
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US9762289B2 (en) | 2014-10-14 | 2017-09-12 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
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US9776716B2 (en) | 2012-12-19 | 2017-10-03 | Elwah LLC | Unoccupied flying vehicle (UFV) inter-vehicle communication for hazard handling |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9787412B2 (en) | 2015-06-25 | 2017-10-10 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
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US9810789B2 (en) | 2012-12-19 | 2017-11-07 | Elwha Llc | Unoccupied flying vehicle (UFV) location assurance |
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US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
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US9836957B2 (en) | 2015-07-14 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9847850B2 (en) | 2014-10-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US9866276B2 (en) | 2014-10-10 | 2018-01-09 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US9876571B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US9876587B2 (en) | 2014-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9882277B2 (en) | 2015-10-02 | 2018-01-30 | At&T Intellectual Property I, Lp | Communication device and antenna assembly with actuated gimbal mount |
US9887447B2 (en) | 2015-05-14 | 2018-02-06 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US9906269B2 (en) | 2014-09-17 | 2018-02-27 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US9912382B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US9930668B2 (en) | 2013-05-31 | 2018-03-27 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9948354B2 (en) | 2015-04-28 | 2018-04-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US10009063B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US10033107B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10033108B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10051629B2 (en) | 2015-09-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10079661B2 (en) | 2015-09-16 | 2018-09-18 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a clock reference |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10103801B2 (en) | 2015-06-03 | 2018-10-16 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US10136434B2 (en) | 2015-09-16 | 2018-11-20 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10142086B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10170840B2 (en) | 2015-07-14 | 2019-01-01 | At&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10225842B2 (en) | 2015-09-16 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method, device and storage medium for communications using a modulated signal and a reference signal |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US10279906B2 (en) | 2012-12-19 | 2019-05-07 | Elwha Llc | Automated hazard handling routine engagement |
US10291311B2 (en) | 2016-09-09 | 2019-05-14 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10341142B2 (en) | 2015-07-14 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10518877B2 (en) | 2012-12-19 | 2019-12-31 | Elwha Llc | Inter-vehicle communication for hazard handling for an unoccupied flying vehicle (UFV) |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10574293B2 (en) | 2017-03-13 | 2020-02-25 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10665942B2 (en) | 2015-10-16 | 2020-05-26 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting wireless communications |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10784670B2 (en) | 2015-07-23 | 2020-09-22 | At&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
US10797781B2 (en) | 2015-06-03 | 2020-10-06 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US10959072B2 (en) | 2016-12-07 | 2021-03-23 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US11032819B2 (en) | 2016-09-15 | 2021-06-08 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
US11891172B2 (en) | 2018-06-21 | 2024-02-06 | Sierra Nevada Corporation | Devices and methods to attach a composite core to a surrounding structure |
Families Citing this family (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7307579B2 (en) * | 2004-11-03 | 2007-12-11 | Flight Safety Technologies, Inc. | Collision alerting and avoidance system |
US7876258B2 (en) * | 2006-03-13 | 2011-01-25 | The Boeing Company | Aircraft collision sense and avoidance system and method |
US20080077284A1 (en) * | 2006-04-19 | 2008-03-27 | Swope John M | System for position and velocity sense of an aircraft |
US20100121574A1 (en) * | 2006-09-05 | 2010-05-13 | Honeywell International Inc. | Method for collision avoidance of unmanned aerial vehicle with other aircraft |
US20100283661A1 (en) * | 2007-01-16 | 2010-11-11 | The Mitre Corporation | Observability of unmanned aircraft and aircraft without electrical systems |
US20090027254A1 (en) * | 2007-02-16 | 2009-01-29 | James Roy Troxel | Method and apparatus to improve the ability to decode ads-b squitters through multiple processing paths |
US7961135B2 (en) * | 2007-05-02 | 2011-06-14 | Aviation Communication & Surveillance Systems Llc | Systems and methods for air traffic surveillance |
EP2153245A1 (en) * | 2007-05-04 | 2010-02-17 | Teledyne Australia Pty Ltd. | Collision avoidance system and method |
FR2919731A1 (en) * | 2007-08-03 | 2009-02-06 | Thales Sa | MODULAR RADAR ARCHITECTURE |
GB0715368D0 (en) | 2007-08-07 | 2007-09-19 | Qinetiq Ltd | Range-finding method and apparatus |
US7970507B2 (en) * | 2008-01-23 | 2011-06-28 | Honeywell International Inc. | Method and system for autonomous tracking of a mobile target by an unmanned aerial vehicle |
US8255153B2 (en) * | 2008-01-23 | 2012-08-28 | Honeywell International Inc. | Automatic alerting method and system for aerial vehicle target tracking |
US8358677B2 (en) * | 2008-06-24 | 2013-01-22 | Honeywell International Inc. | Virtual or remote transponder |
US7969346B2 (en) * | 2008-10-07 | 2011-06-28 | Honeywell International Inc. | Transponder-based beacon transmitter for see and avoid of unmanned aerial vehicles |
US8543265B2 (en) * | 2008-10-20 | 2013-09-24 | Honeywell International Inc. | Systems and methods for unmanned aerial vehicle navigation |
EP2187233B1 (en) | 2008-11-12 | 2013-03-20 | Saab Ab | A range estimation device |
US8626361B2 (en) * | 2008-11-25 | 2014-01-07 | Honeywell International Inc. | System and methods for unmanned aerial vehicle navigation |
US8570211B1 (en) * | 2009-01-22 | 2013-10-29 | Gregory Hubert Piesinger | Aircraft bird strike avoidance method and apparatus |
JP5438993B2 (en) * | 2009-02-25 | 2014-03-12 | 三菱重工業株式会社 | Guided projectile |
JP5398366B2 (en) * | 2009-06-11 | 2014-01-29 | 株式会社東芝 | Pulse detector |
FR2946780B1 (en) * | 2009-06-12 | 2011-07-15 | Thales Sa | METHOD AND DEVICE FOR DISPLAYING FLIGHT MARGINS LIMITS FOR AN AIRCRAFT |
US8368583B1 (en) * | 2009-06-18 | 2013-02-05 | Gregory Hubert Piesinger | Aircraft bird strike avoidance method and apparatus using axial beam antennas |
US20110148578A1 (en) * | 2009-12-09 | 2011-06-23 | Oakland University | Automotive direction finding system based on received power levels |
US8581794B1 (en) * | 2010-03-04 | 2013-11-12 | Qualcomm Incorporated | Circular antenna array systems |
US8828163B2 (en) * | 2010-03-09 | 2014-09-09 | Pti Industries, Inc. | Housing for aircraft mounted components |
US9428261B2 (en) | 2010-03-09 | 2016-08-30 | Pti Industries, Inc. | Housing for aircraft mounted components |
US8378881B2 (en) * | 2010-10-18 | 2013-02-19 | Raytheon Company | Systems and methods for collision avoidance in unmanned aerial vehicles |
US8451165B2 (en) * | 2010-12-06 | 2013-05-28 | Raytheon Company | Mobile radar system |
US8319679B2 (en) * | 2010-12-16 | 2012-11-27 | Honeywell International Inc. | Systems and methods for predicting locations of weather relative to an aircraft |
US9295006B2 (en) * | 2011-02-09 | 2016-03-22 | Qualcomm Incorporated | Real-time calibration of an air to ground communication system |
WO2012149035A2 (en) * | 2011-04-25 | 2012-11-01 | University Of Denver | Radar-based detection and identification for miniature air vehicles |
US9319172B2 (en) | 2011-10-14 | 2016-04-19 | Qualcomm Incorporated | Interference mitigation techniques for air to ground systems |
US9405005B1 (en) | 2012-04-24 | 2016-08-02 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Automatic dependent surveillance broadcast (ADS-B) system for ownership and traffic situational awareness |
US8970423B2 (en) | 2012-05-30 | 2015-03-03 | Honeywell International Inc. | Helicopter collision-avoidance system using light fixture mounted radar sensors |
US10009065B2 (en) | 2012-12-05 | 2018-06-26 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
GB2511732B (en) * | 2013-02-01 | 2015-11-18 | Cambridge Comm Systems Ltd | Antenna arrangement of a wireless node |
JP6135185B2 (en) * | 2013-02-28 | 2017-05-31 | セイコーエプソン株式会社 | Ultrasonic transducer device, head unit, probe, ultrasonic imaging apparatus and electronic equipment |
JP6135184B2 (en) * | 2013-02-28 | 2017-05-31 | セイコーエプソン株式会社 | Ultrasonic transducer device, head unit, probe, and ultrasonic imaging apparatus |
US20140324255A1 (en) * | 2013-03-15 | 2014-10-30 | Shahid Siddiqi | Aircraft emergency system using ads-b |
US9705185B2 (en) | 2013-04-11 | 2017-07-11 | Raytheon Company | Integrated antenna and antenna component |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
CN103592948B (en) * | 2013-12-04 | 2016-04-06 | 成都纵横自动化技术有限公司 | Unmanned plane flight collision avoidance method |
US10240930B2 (en) | 2013-12-10 | 2019-03-26 | SZ DJI Technology Co., Ltd. | Sensor fusion |
WO2016033797A1 (en) * | 2014-09-05 | 2016-03-10 | SZ DJI Technology Co., Ltd. | Multi-sensor environmental mapping |
EP3008535B1 (en) | 2014-09-05 | 2018-05-16 | SZ DJI Technology Co., Ltd. | Context-based flight mode selection |
WO2016033795A1 (en) | 2014-09-05 | 2016-03-10 | SZ DJI Technology Co., Ltd. | Velocity control for an unmanned aerial vehicle |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9564947B2 (en) | 2014-10-21 | 2017-02-07 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with diversity and methods for use therewith |
US9893413B2 (en) * | 2014-12-11 | 2018-02-13 | Appareo Systems, Llc | Integrated, externally-mounted ADS-B device |
US10144036B2 (en) | 2015-01-30 | 2018-12-04 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium |
JP6423521B2 (en) | 2015-03-31 | 2018-11-14 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co.,Ltd | System for controlling unmanned aerial vehicles |
CN107408352B (en) | 2015-03-31 | 2021-07-09 | 深圳市大疆创新科技有限公司 | System and method for geo-fencing device communication |
US10679767B2 (en) | 2015-05-15 | 2020-06-09 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10348391B2 (en) | 2015-06-03 | 2019-07-09 | At&T Intellectual Property I, L.P. | Client node device with frequency conversion and methods for use therewith |
US10154493B2 (en) | 2015-06-03 | 2018-12-11 | At&T Intellectual Property I, L.P. | Network termination and methods for use therewith |
US10439290B2 (en) | 2015-07-14 | 2019-10-08 | At&T Intellectual Property I, L.P. | Apparatus and methods for wireless communications |
US10511346B2 (en) | 2015-07-14 | 2019-12-17 | At&T Intellectual Property I, L.P. | Apparatus and methods for inducing electromagnetic waves on an uninsulated conductor |
US10129057B2 (en) | 2015-07-14 | 2018-11-13 | At&T Intellectual Property I, L.P. | Apparatus and methods for inducing electromagnetic waves on a cable |
US10790593B2 (en) | 2015-07-14 | 2020-09-29 | At&T Intellectual Property I, L.P. | Method and apparatus including an antenna comprising a lens and a body coupled to a feedline having a structure that reduces reflections of electromagnetic waves |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US10317518B2 (en) * | 2015-07-20 | 2019-06-11 | Brigham Young University (Byu) | Phased array radar systems for small unmanned aerial vehicles |
IL241025B (en) * | 2015-09-01 | 2021-10-31 | Uvision Air Ltd | Patch antennas configuration for an unmanned aerial vehicle |
US9705571B2 (en) | 2015-09-16 | 2017-07-11 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system |
WO2017051961A1 (en) * | 2015-09-25 | 2017-03-30 | 엘지전자 주식회사 | Terminal apparatus and control method therefor |
US10074890B2 (en) | 2015-10-02 | 2018-09-11 | At&T Intellectual Property I, L.P. | Communication device and antenna with integrated light assembly |
US10051483B2 (en) | 2015-10-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for directing wireless signals |
US10339818B2 (en) * | 2015-11-24 | 2019-07-02 | Drone Go Home, LLC | Drone defense system |
US10254396B2 (en) * | 2016-01-20 | 2019-04-09 | The Boeing Company | Due regard radar system |
WO2017135371A1 (en) * | 2016-02-05 | 2017-08-10 | Nidec Elesys Corporation | Multicopter with radar system |
US10109938B2 (en) * | 2016-03-16 | 2018-10-23 | Rosemount Aerospace, Inc. | Flex circuit connector configuration |
US10153545B2 (en) * | 2016-03-30 | 2018-12-11 | Raytheon Company | Systems and techniques for improving signal levels in a shadowing region of a seeker system |
US10281586B2 (en) * | 2016-04-07 | 2019-05-07 | Thales USA, Inc. | Transmission data for flight check |
US10089888B2 (en) * | 2016-06-10 | 2018-10-02 | ETAK Systems, LLC | Managing detected obstructions in air traffic control systems for unmanned aerial vehicles |
US9912419B1 (en) | 2016-08-24 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for managing a fault in a distributed antenna system |
EP3306427B1 (en) * | 2016-10-10 | 2019-03-06 | Deutsche Telekom AG | Method for optimized data transmission between an unmanned aerial vehicle and a telecommunications network, unmanned aerial vehicle , system, telecommunications network, program and computer program product |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US10429836B2 (en) * | 2016-11-14 | 2019-10-01 | Electronics And Telecommunications Research Institute | Channel access method in unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US11372096B2 (en) * | 2017-03-20 | 2022-06-28 | David Slemp | Frequency modulated continuous wave antenna system |
US10473775B2 (en) * | 2017-03-20 | 2019-11-12 | David Slemp | Frequency modulated continuous wave antenna system |
US10089894B1 (en) * | 2017-08-30 | 2018-10-02 | Honeywell International Inc. | Apparatus and method of implementing an augmented reality processed terrain and obstacle threat scouting service |
US11125873B1 (en) | 2017-09-20 | 2021-09-21 | Fortem Technologies, Inc. | Using radar sensors for collision avoidance |
DE112018004139T5 (en) * | 2017-09-25 | 2020-04-23 | Hitachi Automotive Systems, Ltd. | Radar device and antenna device |
WO2019079348A1 (en) * | 2017-10-16 | 2019-04-25 | Aviation Communication & Surveillance Systems, Llc | Systems and methods for providing l-band rf architectures |
CN107909856B (en) * | 2017-12-19 | 2019-11-01 | 四川九洲空管科技有限责任公司 | A kind of collision conflict probe method and system |
CN108377169A (en) * | 2018-02-08 | 2018-08-07 | 京东方科技集团股份有限公司 | A kind of vehicle information directive sending method and device |
CN109144097B (en) | 2018-08-15 | 2021-04-06 | 广州极飞科技有限公司 | Obstacle or ground recognition and flight control method, device, equipment and medium |
JP6652620B2 (en) * | 2018-10-18 | 2020-02-26 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co.,Ltd | System for operating unmanned aerial vehicles |
CN109828274B (en) * | 2019-01-07 | 2022-03-04 | 深圳市道通智能航空技术股份有限公司 | Method and device for adjusting main detection direction of airborne radar and unmanned aerial vehicle |
JP2022535999A (en) * | 2019-04-26 | 2022-08-10 | バテル メモリアル インスティチュート | Equiangular/Omnidirectional Differential Split Aperture |
US11328612B2 (en) * | 2019-08-14 | 2022-05-10 | Lane Dalan | System, method, and apparatus for drone positioning control |
CN110632943A (en) * | 2019-09-29 | 2019-12-31 | 成都纳雷科技有限公司 | Unmanned aerial vehicle obstacle avoidance radar tree contour detection method and device based on energy accumulation |
GB2593533A (en) * | 2020-03-27 | 2021-09-29 | Metis Aerospace Ltd | UAV and UAV operator detector |
US11741843B2 (en) * | 2020-04-03 | 2023-08-29 | The Boeing Company | Systems and methods of radar surveillance on-board an autonomous or remotely piloted aircraft |
DE102020207879A1 (en) * | 2020-06-25 | 2021-12-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating a radar sensor in a motor vehicle |
US11325690B1 (en) * | 2020-10-19 | 2022-05-10 | Rockwell Collins, Inc. | Integrated aircraft antenna and light assemblies |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4855748A (en) * | 1988-03-18 | 1989-08-08 | Allied-Signal Inc. | TCAS bearing estimation receiver using a 4 element antenna |
US5933099A (en) * | 1997-02-19 | 1999-08-03 | Mahon; James | Collision avoidance system |
US6211808B1 (en) * | 1999-02-23 | 2001-04-03 | Flight Safety Technologies Inc. | Collision avoidance system for use in aircraft |
US6278396B1 (en) * | 1999-04-08 | 2001-08-21 | L-3 Communications Corporation | Midair collision and avoidance system (MCAS) |
US6314366B1 (en) * | 1993-05-14 | 2001-11-06 | Tom S. Farmakis | Satellite based collision avoidance system |
US20020138200A1 (en) * | 2001-03-26 | 2002-09-26 | William Gutierrez | System and method for aircraft and watercraft control and collision prevention |
US20040046687A1 (en) * | 2002-09-05 | 2004-03-11 | Massachusetts Institute Of Technology | Surveillance system and method for aircraft approach and landing |
US20060007035A1 (en) * | 1999-11-25 | 2006-01-12 | Nigel Corrigan | Airport safety system |
US20070252748A1 (en) * | 2004-11-03 | 2007-11-01 | Flight Safety Technologies, Inc. | Collision alerting and avoidance system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57123704A (en) * | 1981-01-22 | 1982-08-02 | Mitsubishi Electric Corp | Curved-surface array antenna |
JPS60111503A (en) * | 1983-11-21 | 1985-06-18 | Nippon Telegr & Teleph Corp <Ntt> | Array antenna device |
JPH07109963B2 (en) * | 1987-05-28 | 1995-11-22 | 株式会社トキメック | Antenna pointing system |
JPH01254007A (en) * | 1988-04-02 | 1989-10-11 | Sony Corp | Stationary antenna for radar |
JP2939561B2 (en) * | 1989-09-08 | 1999-08-25 | 東洋通信機株式会社 | Microstrip antenna system |
JPH0897632A (en) * | 1994-09-21 | 1996-04-12 | Nippon Telegr & Teleph Corp <Ntt> | Radio transmitter-receiver |
NL1011421C2 (en) * | 1999-03-02 | 2000-09-05 | Tno | Volumetric phased array antenna system. |
GB0117257D0 (en) * | 2001-07-14 | 2001-09-05 | Seabait Ltd | Aquaculture of marine worms |
JP2004125746A (en) * | 2002-10-07 | 2004-04-22 | Mitsubishi Electric Corp | Horn antenna for radar |
JP2004158911A (en) * | 2002-11-01 | 2004-06-03 | Murata Mfg Co Ltd | Sector antenna system and on-vehicle transmitter-receiver |
-
2005
- 2005-11-02 US US11/266,031 patent/US7307579B2/en not_active Expired - Fee Related
- 2005-11-03 KR KR1020077012580A patent/KR20070092959A/en not_active Application Discontinuation
- 2005-11-03 JP JP2007540096A patent/JP2008518844A/en active Pending
- 2005-11-03 WO PCT/US2005/040129 patent/WO2006124063A2/en active Application Filing
- 2005-11-03 EP EP05857971A patent/EP1809327A2/en not_active Withdrawn
-
2007
- 2007-09-10 US US11/900,336 patent/US7443334B2/en not_active Expired - Fee Related
- 2007-10-25 US US11/977,852 patent/US20080055149A1/en not_active Abandoned
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4855748A (en) * | 1988-03-18 | 1989-08-08 | Allied-Signal Inc. | TCAS bearing estimation receiver using a 4 element antenna |
US6314366B1 (en) * | 1993-05-14 | 2001-11-06 | Tom S. Farmakis | Satellite based collision avoidance system |
US5933099A (en) * | 1997-02-19 | 1999-08-03 | Mahon; James | Collision avoidance system |
USRE39053E1 (en) * | 1999-02-23 | 2006-04-04 | Flight Safety Technologies, Inc. | Collision avoidance system for use in aircraft |
US6211808B1 (en) * | 1999-02-23 | 2001-04-03 | Flight Safety Technologies Inc. | Collision avoidance system for use in aircraft |
US6278396B1 (en) * | 1999-04-08 | 2001-08-21 | L-3 Communications Corporation | Midair collision and avoidance system (MCAS) |
US20060007035A1 (en) * | 1999-11-25 | 2006-01-12 | Nigel Corrigan | Airport safety system |
US20020138200A1 (en) * | 2001-03-26 | 2002-09-26 | William Gutierrez | System and method for aircraft and watercraft control and collision prevention |
US20040046687A1 (en) * | 2002-09-05 | 2004-03-11 | Massachusetts Institute Of Technology | Surveillance system and method for aircraft approach and landing |
US6809679B2 (en) * | 2002-09-05 | 2004-10-26 | Massachusetts Institute Of Technology | Surveillance system and method for aircraft approach and landing |
US20070252748A1 (en) * | 2004-11-03 | 2007-11-01 | Flight Safety Technologies, Inc. | Collision alerting and avoidance system |
US7307579B2 (en) * | 2004-11-03 | 2007-12-11 | Flight Safety Technologies, Inc. | Collision alerting and avoidance system |
US20080169962A1 (en) * | 2004-11-03 | 2008-07-17 | Flight Safety Technologies, Inc. | Collision alerting and avoidance system |
US7443334B2 (en) * | 2004-11-03 | 2008-10-28 | Rees Frank L | Collision alerting and avoidance system |
Cited By (248)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090174590A1 (en) * | 2005-06-01 | 2009-07-09 | Albert Gezinus Huizing | Radar system for aircraft |
US8184037B2 (en) * | 2005-06-01 | 2012-05-22 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Radar system for aircraft |
US20080150784A1 (en) * | 2006-12-22 | 2008-06-26 | Intelligent Automation, Inc. | Ads-b radar system |
US7414567B2 (en) * | 2006-12-22 | 2008-08-19 | Intelligent Automation, Inc. | ADS-B radar system |
US20100066604A1 (en) * | 2008-02-15 | 2010-03-18 | Limbaugh Douglas V | Unmanned aerial system position reporting system |
US10026323B2 (en) * | 2008-02-15 | 2018-07-17 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US8386175B2 (en) * | 2008-02-15 | 2013-02-26 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US8437956B2 (en) | 2008-02-15 | 2013-05-07 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system and related methods |
US20160012731A1 (en) * | 2008-02-15 | 2016-01-14 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US9129520B2 (en) * | 2008-02-15 | 2015-09-08 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US9595198B2 (en) * | 2008-02-15 | 2017-03-14 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US20140025282A1 (en) * | 2008-02-15 | 2014-01-23 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system |
US20090248287A1 (en) * | 2008-02-15 | 2009-10-01 | Kutta Technologies, Inc. | Unmanned aerial system position reporting system and related methods |
US7898462B2 (en) * | 2008-10-03 | 2011-03-01 | Honeywell International Inc. | Multi-sector radar sensor |
US8477063B2 (en) | 2008-10-03 | 2013-07-02 | Honeywell International Inc. | System and method for obstacle detection and warning |
US20100087967A1 (en) * | 2008-10-03 | 2010-04-08 | Honeywell International Inc. | Multi-sector radar sensor |
US7868817B2 (en) | 2008-10-03 | 2011-01-11 | Honeywell International Inc. | Radar system for obstacle avoidance |
US20120146783A1 (en) * | 2009-05-20 | 2012-06-14 | Stephan Harms | Method for controlling an obstruction light |
US9604732B2 (en) * | 2009-05-20 | 2017-03-28 | Aloys Wobben | Method for controlling an obstruction light |
US20100315281A1 (en) * | 2009-06-10 | 2010-12-16 | The University Of North Dakota | Airspace risk mitigation system |
US8368584B2 (en) | 2009-06-10 | 2013-02-05 | The University Of North Dakota | Airspace risk mitigation system |
US20120182175A1 (en) * | 2009-07-14 | 2012-07-19 | Robert Bosch Gmbh | UWB Measuring Device |
US9726779B2 (en) * | 2009-07-14 | 2017-08-08 | Robert Bosch Gmbh | UWB measuring device |
US20120166073A1 (en) * | 2009-09-17 | 2012-06-28 | Serge Poirier | Method and system for avoiding an intercepting vehicle by an airborne moving body |
US8718921B2 (en) * | 2009-09-17 | 2014-05-06 | Mbda France | Method and system for avoiding an intercepting vehicle by an airborne moving body |
US20120039422A1 (en) * | 2010-08-09 | 2012-02-16 | Stayton Gregory T | Systems and methods for providing surface multipath mitigation |
US9100087B2 (en) * | 2010-08-09 | 2015-08-04 | Aviation Communication & Surveillance Systems Llc | Systems and methods for providing surface multipath mitigation |
US8624773B2 (en) * | 2010-11-09 | 2014-01-07 | The United States Of America As Represented By The Secretary Of The Army | Multidirectional target detecting system and method |
US20120112957A1 (en) * | 2010-11-09 | 2012-05-10 | U.S. Government As Represented By The Secretary Of The Army | Multidirectional target detecting system and method |
US20120158219A1 (en) * | 2010-12-21 | 2012-06-21 | Michael Richard Durling | Trajectory based sense and avoid |
US9014880B2 (en) * | 2010-12-21 | 2015-04-21 | General Electric Company | Trajectory based sense and avoid |
US9322917B2 (en) * | 2011-01-21 | 2016-04-26 | Farrokh Mohamadi | Multi-stage detection of buried IEDs |
US9037391B2 (en) * | 2011-02-08 | 2015-05-19 | Eads Deutschland Gmbh | Unmanned aircraft with built-in collision warning system |
US20120203450A1 (en) * | 2011-02-08 | 2012-08-09 | Eads Deutschland Gmbh | Unmanned Aircraft with Built-in Collision Warning System |
CN102364553A (en) * | 2011-10-21 | 2012-02-29 | 广州航新航空科技股份有限公司 | Regional airspace management monitoring system based on traffic alert and collision avoidance system (TCAS) |
US20140062754A1 (en) * | 2011-10-26 | 2014-03-06 | Farrokh Mohamadi | Remote detection, confirmation and detonation of buried improvised explosive devices |
US9329001B2 (en) * | 2011-10-26 | 2016-05-03 | Farrokh Mohamadi | Remote detection, confirmation and detonation of buried improvised explosive devices |
US9110168B2 (en) * | 2011-11-18 | 2015-08-18 | Farrokh Mohamadi | Software-defined multi-mode ultra-wideband radar for autonomous vertical take-off and landing of small unmanned aerial systems |
US20140222246A1 (en) * | 2011-11-18 | 2014-08-07 | Farrokh Mohamadi | Software-defined multi-mode ultra-wideband radar for autonomous vertical take-off and landing of small unmanned aerial systems |
US9699785B2 (en) | 2012-12-05 | 2017-07-04 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
US9788326B2 (en) | 2012-12-05 | 2017-10-10 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
US20170033447A1 (en) * | 2012-12-12 | 2017-02-02 | Electronics And Telecommunications Research Institute | Antenna apparatus and method for handover using the same |
US10096907B2 (en) * | 2012-12-12 | 2018-10-09 | Electronics And Telecommunications Research Institute | Antenna apparatus and method for handover using the same |
KR102034674B1 (en) * | 2012-12-12 | 2019-10-21 | 한국전자통신연구원 | Antenna apparatus and method for switching baem using the antenna apparatus |
KR20140076509A (en) * | 2012-12-12 | 2014-06-20 | 한국전자통신연구원 | Antenna apparatus and method for switching baem using the antenna apparatus |
US10429514B2 (en) | 2012-12-19 | 2019-10-01 | Elwha Llc | Unoccupied flying vehicle (UFV) location assurance |
US9776716B2 (en) | 2012-12-19 | 2017-10-03 | Elwah LLC | Unoccupied flying vehicle (UFV) inter-vehicle communication for hazard handling |
US10279906B2 (en) | 2012-12-19 | 2019-05-07 | Elwha Llc | Automated hazard handling routine engagement |
US9567074B2 (en) | 2012-12-19 | 2017-02-14 | Elwha Llc | Base station control for an unoccupied flying vehicle (UFV) |
US9747809B2 (en) * | 2012-12-19 | 2017-08-29 | Elwha Llc | Automated hazard handling routine activation |
US20140303884A1 (en) * | 2012-12-19 | 2014-10-09 | Elwha LLC, a limited liability corporation of the State of Delaware | Automated hazard handling routine activation |
US9235218B2 (en) | 2012-12-19 | 2016-01-12 | Elwha Llc | Collision targeting for an unoccupied flying vehicle (UFV) |
US9810789B2 (en) | 2012-12-19 | 2017-11-07 | Elwha Llc | Unoccupied flying vehicle (UFV) location assurance |
US9405296B2 (en) | 2012-12-19 | 2016-08-02 | Elwah LLC | Collision targeting for hazard handling |
US9540102B2 (en) | 2012-12-19 | 2017-01-10 | Elwha Llc | Base station multi-vehicle coordination |
US9527586B2 (en) | 2012-12-19 | 2016-12-27 | Elwha Llc | Inter-vehicle flight attribute communication for an unoccupied flying vehicle (UFV) |
US10518877B2 (en) | 2012-12-19 | 2019-12-31 | Elwha Llc | Inter-vehicle communication for hazard handling for an unoccupied flying vehicle (UFV) |
US9669926B2 (en) | 2012-12-19 | 2017-06-06 | Elwha Llc | Unoccupied flying vehicle (UFV) location confirmance |
US9527587B2 (en) | 2012-12-19 | 2016-12-27 | Elwha Llc | Unoccupied flying vehicle (UFV) coordination |
US9930668B2 (en) | 2013-05-31 | 2018-03-27 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US10051630B2 (en) | 2013-05-31 | 2018-08-14 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US10091787B2 (en) | 2013-05-31 | 2018-10-02 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9661505B2 (en) | 2013-11-06 | 2017-05-23 | At&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
US9674711B2 (en) | 2013-11-06 | 2017-06-06 | At&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
US9794003B2 (en) | 2013-12-10 | 2017-10-17 | At&T Intellectual Property I, L.P. | Quasi-optical coupler |
CN104155654A (en) * | 2014-08-13 | 2014-11-19 | 芜湖航飞科技股份有限公司 | Airborne radar |
US9692101B2 (en) | 2014-08-26 | 2017-06-27 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
US10096881B2 (en) | 2014-08-26 | 2018-10-09 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves to an outer surface of a transmission medium |
US9768833B2 (en) | 2014-09-15 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US10063280B2 (en) | 2014-09-17 | 2018-08-28 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9906269B2 (en) | 2014-09-17 | 2018-02-27 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9628854B2 (en) | 2014-09-29 | 2017-04-18 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing content in a communication network |
US9615269B2 (en) | 2014-10-02 | 2017-04-04 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9998932B2 (en) | 2014-10-02 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9973416B2 (en) | 2014-10-02 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9866276B2 (en) | 2014-10-10 | 2018-01-09 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9973299B2 (en) | 2014-10-14 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9762289B2 (en) | 2014-10-14 | 2017-09-12 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
US9847850B2 (en) | 2014-10-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9954286B2 (en) | 2014-10-21 | 2018-04-24 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9596001B2 (en) | 2014-10-21 | 2017-03-14 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9577306B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9871558B2 (en) | 2014-10-21 | 2018-01-16 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9876587B2 (en) | 2014-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
US9577307B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9948355B2 (en) | 2014-10-21 | 2018-04-17 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9960808B2 (en) | 2014-10-21 | 2018-05-01 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9525210B2 (en) | 2014-10-21 | 2016-12-20 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9912033B2 (en) | 2014-10-21 | 2018-03-06 | At&T Intellectual Property I, Lp | Guided wave coupler, coupling module and methods for use therewith |
US9653770B2 (en) | 2014-10-21 | 2017-05-16 | At&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
US9627768B2 (en) | 2014-10-21 | 2017-04-18 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9654173B2 (en) | 2014-11-20 | 2017-05-16 | At&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
US9749083B2 (en) | 2014-11-20 | 2017-08-29 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9800327B2 (en) | 2014-11-20 | 2017-10-24 | At&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US9544006B2 (en) | 2014-11-20 | 2017-01-10 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9712350B2 (en) | 2014-11-20 | 2017-07-18 | At&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
US9742521B2 (en) | 2014-11-20 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9876570B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9876571B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US9793955B2 (en) | 2015-04-24 | 2017-10-17 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9831912B2 (en) | 2015-04-24 | 2017-11-28 | At&T Intellectual Property I, Lp | Directional coupling device and methods for use therewith |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US10224981B2 (en) | 2015-04-24 | 2019-03-05 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9948354B2 (en) | 2015-04-28 | 2018-04-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US9887447B2 (en) | 2015-05-14 | 2018-02-06 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US10797781B2 (en) | 2015-06-03 | 2020-10-06 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US9912381B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
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US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US10142086B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US10142010B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
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US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9787412B2 (en) | 2015-06-25 | 2017-10-10 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US10069185B2 (en) | 2015-06-25 | 2018-09-04 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9882657B2 (en) | 2015-06-25 | 2018-01-30 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US10090601B2 (en) | 2015-06-25 | 2018-10-02 | At&T Intellectual Property I, L.P. | Waveguide system and methods for inducing a non-fundamental wave mode on a transmission medium |
US9640850B2 (en) | 2015-06-25 | 2017-05-02 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10170840B2 (en) | 2015-07-14 | 2019-01-01 | At&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
US9947982B2 (en) | 2015-07-14 | 2018-04-17 | At&T Intellectual Property I, Lp | Dielectric transmission medium connector and methods for use therewith |
US9836957B2 (en) | 2015-07-14 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US9628116B2 (en) | 2015-07-14 | 2017-04-18 | At&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
US10341142B2 (en) | 2015-07-14 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US9929755B2 (en) | 2015-07-14 | 2018-03-27 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10033108B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
US10033107B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9608740B2 (en) | 2015-07-15 | 2017-03-28 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US10784670B2 (en) | 2015-07-23 | 2020-09-22 | At&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US9806818B2 (en) | 2015-07-23 | 2017-10-31 | At&T Intellectual Property I, Lp | Node device, repeater and methods for use therewith |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US10074886B2 (en) | 2015-07-23 | 2018-09-11 | At&T Intellectual Property I, L.P. | Dielectric transmission medium comprising a plurality of rigid dielectric members coupled together in a ball and socket configuration |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9838078B2 (en) | 2015-07-31 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US10938123B2 (en) * | 2015-07-31 | 2021-03-02 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
WO2017023412A1 (en) * | 2015-07-31 | 2017-02-09 | At&T Intellectual Property I, Lp | Radial antenna and methods for use therewith |
US20170033464A1 (en) * | 2015-07-31 | 2017-02-02 | At&T Intellectual Property I, Lp | Radial antenna and methods for use therewith |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US20180287260A1 (en) * | 2015-07-31 | 2018-10-04 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
US10020587B2 (en) * | 2015-07-31 | 2018-07-10 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US10512092B2 (en) | 2015-09-16 | 2019-12-17 | At&T Intellectual Property I, L.P. | Modulated signals in spectral segments for managing utilization of wireless resources |
US10009063B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10547349B2 (en) | 2015-09-16 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10136434B2 (en) | 2015-09-16 | 2018-11-20 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
US10736117B2 (en) | 2015-09-16 | 2020-08-04 | At&T Intellectual Property I, L.P. | Method and base station for managing utilization of wireless resources using multiple carrier frequencies |
US10079661B2 (en) | 2015-09-16 | 2018-09-18 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a clock reference |
US10225842B2 (en) | 2015-09-16 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method, device and storage medium for communications using a modulated signal and a reference signal |
US10516515B2 (en) | 2015-09-16 | 2019-12-24 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US10772102B2 (en) | 2015-09-16 | 2020-09-08 | At&T Intellectual Property I, L.P. | Method and apparatus for managing utilization of wireless resources via use of a reference signal to reduce distortion |
US10051629B2 (en) | 2015-09-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9882277B2 (en) | 2015-10-02 | 2018-01-30 | At&T Intellectual Property I, Lp | Communication device and antenna assembly with actuated gimbal mount |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US9685092B2 (en) | 2015-10-08 | 2017-06-20 | Honeywell International Inc. | Stationary obstacle identification system |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US10665942B2 (en) | 2015-10-16 | 2020-05-26 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting wireless communications |
US9892647B2 (en) * | 2015-12-17 | 2018-02-13 | Honeywell International Inc. | On-ground vehicle collision avoidance utilizing shared vehicle hazard sensor data |
US20170178520A1 (en) * | 2015-12-17 | 2017-06-22 | Honeywell International Inc. | On-ground vehicle collision avoidance utilizing shared vehicle hazard sensor data |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US10291311B2 (en) | 2016-09-09 | 2019-05-14 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
US11032819B2 (en) | 2016-09-15 | 2021-06-08 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
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US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
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US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US10574293B2 (en) | 2017-03-13 | 2020-02-25 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US11891172B2 (en) | 2018-06-21 | 2024-02-06 | Sierra Nevada Corporation | Devices and methods to attach a composite core to a surrounding structure |
Also Published As
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EP1809327A2 (en) | 2007-07-25 |
WO2006124063A2 (en) | 2006-11-23 |
US7443334B2 (en) | 2008-10-28 |
WO2006124063A3 (en) | 2007-09-07 |
US7307579B2 (en) | 2007-12-11 |
US20070252748A1 (en) | 2007-11-01 |
US20080169962A1 (en) | 2008-07-17 |
JP2008518844A (en) | 2008-06-05 |
KR20070092959A (en) | 2007-09-14 |
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