CA2343059A1 - Method and apparatus for increasing the sensitivity of a global positioning satellite receiver - Google Patents

Method and apparatus for increasing the sensitivity of a global positioning satellite receiver Download PDF

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Publication number
CA2343059A1
CA2343059A1 CA002343059A CA2343059A CA2343059A1 CA 2343059 A1 CA2343059 A1 CA 2343059A1 CA 002343059 A CA002343059 A CA 002343059A CA 2343059 A CA2343059 A CA 2343059A CA 2343059 A1 CA2343059 A1 CA 2343059A1
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CA
Canada
Prior art keywords
gps
signal
output
correlation
code periods
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002343059A
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French (fr)
Other versions
CA2343059C (en
Inventor
Samir S. Soliman
Serguei A. Glazko
Parag A. Agashe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Incorporated
Samir S. Soliman
Serguei A. Glazko
Parag A. Agashe
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated, Samir S. Soliman, Serguei A. Glazko, Parag A. Agashe filed Critical Qualcomm Incorporated
Publication of CA2343059A1 publication Critical patent/CA2343059A1/en
Application granted granted Critical
Publication of CA2343059C publication Critical patent/CA2343059C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/04—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/246—Acquisition or tracking or demodulation of signals transmitted by the system involving long acquisition integration times, extended snapshots of signals or methods specifically directed towards weak signal acquisition

Abstract

Method and apparatus providing enhanced sensitivity for GPS receivers (400, 500, 600, 700) by allowing coherent integration of a correlation over several code periods of a GPS signal in one embodiment, and by performing a time to frequency domain conversion to the output from a correlation processor (507) in a second embodiment. In the case in which coherent integration is performed over several code periods, advantage is taken of the fact that CDMA cellular telephone base stations transmit information that allows the receiver to determine GPS time before beginning a GPS signal acquisition process. The integration can be expanded to include code periods from more than one bit period, if the GPS receiver (400, 500, 600, 700) takes advantage of the fact that known bit patterns are transmitted at particular times within the transmission from a GPS satellite. If no base station is within range, then the output from a correlator (507) that integrates a correlation over one code period is used to generate values that are input to a discrete time domain to frequency domain transform processor (511). The output from the transform processor (511) will indicate the presence of a signal from a particular satellite and the offset between locally generated signal and the received GPS
signal.
CA002343059A 1998-09-08 1999-09-02 Method and apparatus for increasing the sensitivity of a global positioning satellite receiver Expired - Lifetime CA2343059C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/149,428 1998-09-08
US09/149,428 US6327473B1 (en) 1998-09-08 1998-09-08 Method and apparatus for increasing the sensitivity of a global positioning satellite receiver
PCT/US1999/020341 WO2000014560A1 (en) 1998-09-08 1999-09-02 Method and apparatus for increasing the sensitivity of a global positioning satellite receiver

Publications (2)

Publication Number Publication Date
CA2343059A1 true CA2343059A1 (en) 2000-03-16
CA2343059C CA2343059C (en) 2005-06-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002343059A Expired - Lifetime CA2343059C (en) 1998-09-08 1999-09-02 Method and apparatus for increasing the sensitivity of a global positioning satellite receiver

Country Status (20)

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US (1) US6327473B1 (en)
EP (3) EP2270542A1 (en)
JP (1) JP4619536B2 (en)
KR (1) KR100682782B1 (en)
CN (2) CN101042429B (en)
AR (1) AR020397A1 (en)
AT (2) ATE446517T1 (en)
AU (1) AU764972B2 (en)
BR (1) BRPI9913499B1 (en)
CA (1) CA2343059C (en)
DE (1) DE69941575D1 (en)
ES (2) ES2375812T3 (en)
HK (1) HK1050050B (en)
ID (1) ID29019A (en)
IL (2) IL141836A0 (en)
MX (1) MXPA01002396A (en)
MY (1) MY123262A (en)
TR (1) TR200101258T2 (en)
WO (1) WO2000014560A1 (en)
ZA (1) ZA200101922B (en)

Families Citing this family (129)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8352400B2 (en) 1991-12-23 2013-01-08 Hoffberg Steven M Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore
US10361802B1 (en) 1999-02-01 2019-07-23 Blanding Hovenweep, Llc Adaptive pattern recognition based control system and method
US7092369B2 (en) 1995-11-17 2006-08-15 Symbol Technologies, Inc. Communications network with wireless gateways for mobile terminal access
US7904187B2 (en) 1999-02-01 2011-03-08 Hoffberg Steven M Internet appliance system and method
US9020756B2 (en) * 1999-04-23 2015-04-28 Global Locate, Inc. Method and apparatus for processing satellite positioning system signals
US7053824B2 (en) * 2001-11-06 2006-05-30 Global Locate, Inc. Method and apparatus for receiving a global positioning system signal using a cellular acquisition signal
US6704348B2 (en) 2001-05-18 2004-03-09 Global Locate, Inc. Method and apparatus for computing signal correlation at multiple resolutions
JP4292442B2 (en) * 2000-01-31 2009-07-08 ソニー株式会社 Global positioning system receiver and portable radio terminal
JP4277151B2 (en) * 2000-01-31 2009-06-10 ソニー株式会社 Global positioning system receiver and demodulation processing control method
US6429811B1 (en) 2000-02-15 2002-08-06 Motorola, Inc. Method and apparatus for compressing GPS satellite broadcast message information
JP4543480B2 (en) * 2000-03-02 2010-09-15 ソニー株式会社 GPS receiver and GPS positioning method
US6850557B1 (en) * 2000-04-18 2005-02-01 Sirf Technology, Inc. Signal detector and method employing a coherent accumulation system to correlate non-uniform and disjoint sample segments
US6922546B1 (en) * 2000-05-03 2005-07-26 Lucent Technologies Inc. GPS signal acquisition based on frequency-domain and time-domain processing
US7949362B2 (en) 2000-05-18 2011-05-24 Sirf Technology, Inc. Satellite positioning aided communication system selection
US7970411B2 (en) 2000-05-18 2011-06-28 Sirf Technology, Inc. Aided location communication system
US7929928B2 (en) 2000-05-18 2011-04-19 Sirf Technology Inc. Frequency phase correction system
US8078189B2 (en) 2000-08-14 2011-12-13 Sirf Technology, Inc. System and method for providing location based services over a network
US7970412B2 (en) 2000-05-18 2011-06-28 Sirf Technology, Inc. Aided location communication system
FI110290B (en) * 2000-05-30 2002-12-31 Nokia Corp A method for determining the phase of information and an electronic device
US6466161B2 (en) 2000-08-24 2002-10-15 Sirf Technology, Inc. Location services system that reduces auto-correlation or cross-correlation in weak signals
US7680178B2 (en) 2000-08-24 2010-03-16 Sirf Technology, Inc. Cross-correlation detection and elimination in a receiver
US7047023B1 (en) 2000-12-01 2006-05-16 Sirf Technology, Inc. GPS RF front end IC with frequency plan for improved integrability
US6452541B1 (en) 2001-02-20 2002-09-17 Motorola, Inc. Time synchronization of a satellite positioning system enabled mobile receiver and base station
FI109311B (en) * 2001-03-16 2002-06-28 Nokia Corp Bit boundary detection method for global positioning system, involves utilizing index of largest element of determination vector formed based on received signal, to indicate bit boundary
US6901264B2 (en) * 2001-04-25 2005-05-31 Makor Issues And Rights Ltd. Method and system for mobile station positioning in cellular communication networks
US7567636B2 (en) 2001-05-18 2009-07-28 Global Locate, Inc. Method and apparatus for performing signal correlation using historical correlation data
US7769076B2 (en) 2001-05-18 2010-08-03 Broadcom Corporation Method and apparatus for performing frequency synchronization
US6819707B2 (en) * 2001-05-18 2004-11-16 Global Locate, Inc. Method and apparatus for performing signal correlation using historical correlation data
US6891880B2 (en) * 2001-05-18 2005-05-10 Global Locate, Inc. Method and apparatus for performing signal correlation
US7006556B2 (en) 2001-05-18 2006-02-28 Global Locate, Inc. Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference
US7995682B2 (en) 2001-05-18 2011-08-09 Broadcom Corporation Method and apparatus for performing signal processing using historical correlation data
US7190712B2 (en) 2001-05-18 2007-03-13 Global Locate, Inc Method and apparatus for performing signal correlation
US7668554B2 (en) 2001-05-21 2010-02-23 Sirf Technology, Inc. Network system for aided GPS broadcast positioning
US7164736B2 (en) 2001-06-22 2007-01-16 Sirf Technology, Inc. Synthesizing coherent correlation sums at one or multiple carrier frequencies using correlation sums calculated at a course set of frequencies
US6512479B1 (en) 2001-06-22 2003-01-28 Enuvis, Inc. Signal acquisition using data bit information
GB0117883D0 (en) * 2001-07-21 2001-09-12 Koninkl Philips Electronics Nv Method and apparatus for estimating gps time
US6965754B2 (en) * 2001-10-09 2005-11-15 Motorola, Inc. Satellite positioning system receiver with reference oscillator circuit and methods therefor
US6559795B1 (en) * 2002-02-19 2003-05-06 Seiko Epson Corporation High-sensitivity infrequent use of servers
US8290505B2 (en) 2006-08-29 2012-10-16 Telecommunications Systems, Inc. Consequential location derived information
US8918073B2 (en) 2002-03-28 2014-12-23 Telecommunication Systems, Inc. Wireless telecommunications location based services scheme selection
US7426380B2 (en) 2002-03-28 2008-09-16 Telecommunication Systems, Inc. Location derived presence information
US8027697B2 (en) 2007-09-28 2011-09-27 Telecommunication Systems, Inc. Public safety access point (PSAP) selection for E911 wireless callers in a GSM type system
US9154906B2 (en) 2002-03-28 2015-10-06 Telecommunication Systems, Inc. Area watcher for wireless network
US8126889B2 (en) 2002-03-28 2012-02-28 Telecommunication Systems, Inc. Location fidelity adjustment based on mobile subscriber privacy profile
FI112976B (en) * 2002-10-08 2004-02-13 Nokia Corp Positioning method for electronic device e.g. positioning receiver, by converting assistance information to meta data format for subsequent transmission to electronic device which in turn uses the assistance information when necessary
US7132980B2 (en) * 2002-11-01 2006-11-07 Sirf Technology, Inc. Multi-function device with positioning system and shared processor
US8666397B2 (en) 2002-12-13 2014-03-04 Telecommunication Systems, Inc. Area event handling when current network does not cover target area
US6768452B2 (en) * 2002-12-19 2004-07-27 Texas Instrucments Incorporated System and method for providing time to a satellite positioning system (SPS) receiver from a networked time server
KR100531879B1 (en) * 2003-07-09 2005-11-29 엘지전자 주식회사 Radio frequency reception circuit for mobile phone
US7248624B2 (en) * 2003-08-28 2007-07-24 Qualcomm Incorporated Bit synchronization in a communications device
WO2008024123A2 (en) 2005-10-28 2008-02-28 Sirf Technology, Inc. Global positioning system receiver timeline management
KR20070012308A (en) 2003-09-02 2007-01-25 서프 테크놀러지, 인코포레이티드 Signal processing system for satellite positioning signals
US8138972B2 (en) 2003-09-02 2012-03-20 Csr Technology Inc. Signal processing system for satellite positioning signals
US7424293B2 (en) 2003-12-02 2008-09-09 Telecommunication Systems, Inc. User plane location based service using message tunneling to support roaming
US7260186B2 (en) 2004-03-23 2007-08-21 Telecommunication Systems, Inc. Solutions for voice over internet protocol (VoIP) 911 location services
US20080090546A1 (en) 2006-10-17 2008-04-17 Richard Dickinson Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US20080126535A1 (en) 2006-11-28 2008-05-29 Yinjun Zhu User plane location services over session initiation protocol (SIP)
US7026987B2 (en) * 2004-02-10 2006-04-11 Thales Navigation, Inc. Asynchronous assisted GPS position determination
DE102004035608B4 (en) * 2004-07-22 2016-02-04 Intel Deutschland Gmbh Receiver of a position determination system and method for determining position with increased sensitivity
US7113128B1 (en) 2004-10-15 2006-09-26 Telecommunication Systems, Inc. Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas
US6985105B1 (en) 2004-10-15 2006-01-10 Telecommunication Systems, Inc. Culled satellite ephemeris information based on limiting a span of an inverted cone for locating satellite in-range determinations
US7629926B2 (en) 2004-10-15 2009-12-08 Telecommunication Systems, Inc. Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas
US7411546B2 (en) 2004-10-15 2008-08-12 Telecommunication Systems, Inc. Other cell sites used as reference point to cull satellite ephemeris information for quick, accurate assisted locating satellite location determination
GB0424500D0 (en) * 2004-11-05 2004-12-08 Univ Bath A method and apparatus for correlating data sequences
US7751833B2 (en) * 2005-03-15 2010-07-06 Nextel Communications Inc. System and method for determining a base transceiver station location
US20060208943A1 (en) * 2005-03-21 2006-09-21 Sirf Technology, Inc. Location tagging using post-processing
US7353034B2 (en) 2005-04-04 2008-04-01 X One, Inc. Location sharing and tracking using mobile phones or other wireless devices
US8660573B2 (en) 2005-07-19 2014-02-25 Telecommunications Systems, Inc. Location service requests throttling
US7729457B2 (en) * 2005-07-25 2010-06-01 Mstar Semiconductor, Inc. Method of weak signal acquisition and associated apparatus
US7630430B2 (en) 2005-07-25 2009-12-08 Mstar Semiconductor, Inc. Method and apparatus for accelerating correlation processing of GPS signal
US7295156B2 (en) * 2005-08-08 2007-11-13 Trimble Navigation Limited Cellphone GPS positioning system
US7283091B1 (en) * 2005-08-08 2007-10-16 Trimble Navigation Limited Radio positioning system for providing position and time for assisting GPS signal acquisition in mobile unit
US9282451B2 (en) 2005-09-26 2016-03-08 Telecommunication Systems, Inc. Automatic location identification (ALI) service requests steering, connection sharing and protocol translation
US7825780B2 (en) 2005-10-05 2010-11-02 Telecommunication Systems, Inc. Cellular augmented vehicle alarm notification together with location services for position of an alarming vehicle
US8467320B2 (en) 2005-10-06 2013-06-18 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) multi-user conferencing
US7907551B2 (en) 2005-10-06 2011-03-15 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) location based 911 conferencing
US7498981B2 (en) * 2005-10-07 2009-03-03 The Charles Stark Draper Laboratory, Inc. Method and apparatus for real-time digital processing of satellite positional signals for fast acquisition and low SNR tracking
US8150363B2 (en) 2006-02-16 2012-04-03 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
JP4755920B2 (en) * 2006-02-23 2011-08-24 古野電気株式会社 Carrier phase tracking device and pseudo noise code signal tracking device
US8059789B2 (en) 2006-02-24 2011-11-15 Telecommunication Systems, Inc. Automatic location identification (ALI) emergency services pseudo key (ESPK)
US7471236B1 (en) 2006-03-01 2008-12-30 Telecommunication Systems, Inc. Cellular augmented radar/laser detector
US7899450B2 (en) 2006-03-01 2011-03-01 Telecommunication Systems, Inc. Cellular augmented radar/laser detection using local mobile network within cellular network
US9167553B2 (en) 2006-03-01 2015-10-20 Telecommunication Systems, Inc. GeoNexus proximity detector network
US8208605B2 (en) 2006-05-04 2012-06-26 Telecommunication Systems, Inc. Extended efficient usage of emergency services keys
US8149897B2 (en) 2006-05-26 2012-04-03 Global Locate, Inc. Method and apparatus for performing signal correlation for signals received from satellites in multiple satellite systems
WO2008057477A2 (en) 2006-11-03 2008-05-15 Telecommunication Systems, Inc. Roaming gateway enabling location based services (lbs) roaming for user plane in cdma networks without requiring use of a mobile positioning center (mpc)
US8050386B2 (en) 2007-02-12 2011-11-01 Telecommunication Systems, Inc. Mobile automatic location identification (ALI) for first responders
JP5005446B2 (en) * 2007-07-03 2012-08-22 日本無線株式会社 Independent high-sensitivity satellite signal receiver
US7903600B2 (en) * 2007-07-05 2011-03-08 Mediatek Inc. Control of CDMA signal integration
US20090254274A1 (en) * 2007-07-27 2009-10-08 Kulik Victor Navigation system for providing celestial and terrestrial information
WO2009038726A1 (en) 2007-09-17 2009-03-26 Telecommunication Systems, Inc. Emergency 911 data messaging
US9130963B2 (en) 2011-04-06 2015-09-08 Telecommunication Systems, Inc. Ancillary data support in session initiation protocol (SIP) messaging
US7929530B2 (en) 2007-11-30 2011-04-19 Telecommunication Systems, Inc. Ancillary data support in session initiation protocol (SIP) messaging
EP2232292B1 (en) * 2007-12-14 2013-08-14 Magellan Systems Japan, Inc. Process for sub-microsecond time transfer using weak gps/gnss signals
EP2288930B1 (en) 2008-02-28 2013-12-11 Magellan Systems Japan, Inc. Method and apparatus for acquisition, tracking, and sub-microsecond time transfer using weak gps/gnss signals
US8068587B2 (en) 2008-08-22 2011-11-29 Telecommunication Systems, Inc. Nationwide table routing of voice over internet protocol (VOIP) emergency calls
US8892128B2 (en) 2008-10-14 2014-11-18 Telecommunication Systems, Inc. Location based geo-reminders
US8525681B2 (en) 2008-10-14 2013-09-03 Telecommunication Systems, Inc. Location based proximity alert
US8547950B2 (en) * 2009-05-04 2013-10-01 Infineon Technologies Ag Squaring loss inhibition for low signal levels in positioning systems
US8593342B2 (en) * 2009-03-11 2013-11-26 CSR Technology Holdings Inc. Utilizing SBAS signals to improve GNSS receiver performance
US9301191B2 (en) 2013-09-20 2016-03-29 Telecommunication Systems, Inc. Quality of service to over the top applications used with VPN
US8867485B2 (en) 2009-05-05 2014-10-21 Telecommunication Systems, Inc. Multiple location retrieval function (LRF) network having location continuity
US8315599B2 (en) 2010-07-09 2012-11-20 Telecommunication Systems, Inc. Location privacy selector
US8336664B2 (en) 2010-07-09 2012-12-25 Telecommunication Systems, Inc. Telematics basic mobile device safety interlock
US8942743B2 (en) 2010-12-17 2015-01-27 Telecommunication Systems, Inc. iALERT enhanced alert manager
US8688087B2 (en) 2010-12-17 2014-04-01 Telecommunication Systems, Inc. N-dimensional affinity confluencer
WO2012141762A1 (en) 2011-02-25 2012-10-18 Telecommunication Systems, Inc. Mobile internet protocol (ip) location
US8649806B2 (en) 2011-09-02 2014-02-11 Telecommunication Systems, Inc. Aggregate location dynometer (ALD)
US9479344B2 (en) 2011-09-16 2016-10-25 Telecommunication Systems, Inc. Anonymous voice conversation
US8831556B2 (en) 2011-09-30 2014-09-09 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank emergency 911 calls
US9313637B2 (en) 2011-12-05 2016-04-12 Telecommunication Systems, Inc. Wireless emergency caller profile data delivery over a legacy interface
US9264537B2 (en) 2011-12-05 2016-02-16 Telecommunication Systems, Inc. Special emergency call treatment based on the caller
US8984591B2 (en) 2011-12-16 2015-03-17 Telecommunications Systems, Inc. Authentication via motion of wireless device movement
US9384339B2 (en) 2012-01-13 2016-07-05 Telecommunication Systems, Inc. Authenticating cloud computing enabling secure services
US8688174B2 (en) 2012-03-13 2014-04-01 Telecommunication Systems, Inc. Integrated, detachable ear bud device for a wireless phone
US9544260B2 (en) 2012-03-26 2017-01-10 Telecommunication Systems, Inc. Rapid assignment dynamic ownership queue
US9307372B2 (en) 2012-03-26 2016-04-05 Telecommunication Systems, Inc. No responders online
US9338153B2 (en) 2012-04-11 2016-05-10 Telecommunication Systems, Inc. Secure distribution of non-privileged authentication credentials
RU2658337C2 (en) * 2012-06-08 2018-06-20 Конинклейке Филипс Н.В. Method of determining the position of a device and a device that implements the method
US9313638B2 (en) 2012-08-15 2016-04-12 Telecommunication Systems, Inc. Device independent caller data access for emergency calls
US9208346B2 (en) 2012-09-05 2015-12-08 Telecommunication Systems, Inc. Persona-notitia intellection codifier
US9456301B2 (en) 2012-12-11 2016-09-27 Telecommunication Systems, Inc. Efficient prisoner tracking
US8983047B2 (en) 2013-03-20 2015-03-17 Telecommunication Systems, Inc. Index of suspicion determination for communications request
US9408034B2 (en) 2013-09-09 2016-08-02 Telecommunication Systems, Inc. Extended area event for network based proximity discovery
US9516104B2 (en) 2013-09-11 2016-12-06 Telecommunication Systems, Inc. Intelligent load balancer enhanced routing
US9479897B2 (en) 2013-10-03 2016-10-25 Telecommunication Systems, Inc. SUPL-WiFi access point controller location based services for WiFi enabled mobile devices
KR20150105802A (en) * 2014-03-10 2015-09-18 삼성전자주식회사 Beacon signal control method of electronic apparatus and electronic apparatus thereof
US20180199298A1 (en) * 2015-07-29 2018-07-12 Sony Corporation Communications devices and methods
CN108345013B (en) * 2018-04-16 2023-09-01 南京天际易达通信技术有限公司 Method for improving satellite navigation signal receiving sensitivity

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701934A (en) * 1985-09-03 1987-10-20 Motorola, Inc. Method of doppler searching in a digital GPS receiver
US4998111A (en) * 1989-11-27 1991-03-05 Motorola, Inc. CPS transform correlation receiver and method
US5414729A (en) * 1992-01-24 1995-05-09 Novatel Communications Ltd. Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing
US5319374A (en) * 1993-02-02 1994-06-07 Trimble Navigation Limited Precise universal time for vehicles
US5420592A (en) * 1993-04-05 1995-05-30 Radix Technologies, Inc. Separated GPS sensor and processing system for remote GPS sensing and centralized ground station processing for remote mobile position and velocity determinations
DE69431287T2 (en) * 1993-06-14 2003-05-15 Ericsson Telefon Ab L M TRANSMISSION TIME ADJUSTMENT IN THE DOWNWARD CONNECTION OF A SYSTEM WITH CODEMULTIPLEX MULTIPLE ACCESS
JP2677191B2 (en) * 1994-03-15 1997-11-17 日本電気株式会社 CDMA communication system
US5666122A (en) * 1994-07-11 1997-09-09 Qualcomm Incorporated Method for rapid signal acquisition in a satellite communications system
JP2661589B2 (en) * 1995-05-22 1997-10-08 日本電気株式会社 Dynamic queuing method by GPS
EP2112525A1 (en) * 1995-10-09 2009-10-28 Snaptrack, Inc. Method for determining a position of a mobile sps receiver using epoch
US5841396A (en) * 1996-03-08 1998-11-24 Snaptrack, Inc. GPS receiver utilizing a communication link
DE69625496T2 (en) 1995-10-09 2003-10-30 Snaptrack Inc GPS RECEIVER AND METHOD FOR PROCESSING GPS SIGNALS
US6133871A (en) 1995-10-09 2000-10-17 Snaptrack, Inc. GPS receiver having power management
PT880713E (en) * 1995-10-09 2004-01-30 Snaptrack Inc GPS POSITIONING SYSTEM AND COMBINED COMMUNICATIONS SYSTEM USING SHARED CIRCUITS
US5945944A (en) * 1996-03-08 1999-08-31 Snaptrack, Inc. Method and apparatus for determining time for GPS receivers
JPH1013918A (en) * 1996-06-19 1998-01-16 Toshiba Corp Moving communication system, adapting code division multiple access system, and its radio communication device
US5893044A (en) * 1997-01-21 1999-04-06 Motorola Inc. Real time clock apparatus for fast acquisition or GPS signals
US5920278A (en) * 1997-05-28 1999-07-06 Gregory D. Gibbons Method and apparatus for identifying, locating, tracking, or communicating with remote objects
US6031487A (en) * 1998-03-25 2000-02-29 Rockwell Collins, Inc. GPS pseudolite and receiver system using high anti-jam pseudolite signal structure
US6014548A (en) * 1998-04-03 2000-01-11 Ericsson Inc. Method and apparatus for facilitating detection of a synchronization signal generated by a satellite communication network

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Publication number Publication date
CN100342242C (en) 2007-10-10
EP2146216B1 (en) 2011-12-07
ID29019A (en) 2001-07-26
AU764972B2 (en) 2003-09-04
HK1050050A1 (en) 2003-06-06
ES2334527T3 (en) 2010-03-11
JP2002524744A (en) 2002-08-06
ATE536556T1 (en) 2011-12-15
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