WO2000041319A3 - Multiple demodulation protocols for a wireless location system - Google Patents

Multiple demodulation protocols for a wireless location system Download PDF

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Publication number
WO2000041319A3
WO2000041319A3 PCT/US1999/029581 US9929581W WO0041319A3 WO 2000041319 A3 WO2000041319 A3 WO 2000041319A3 US 9929581 W US9929581 W US 9929581W WO 0041319 A3 WO0041319 A3 WO 0041319A3
Authority
WO
WIPO (PCT)
Prior art keywords
wireless location
location system
dsp
lines
multiple demodulation
Prior art date
Application number
PCT/US1999/029581
Other languages
French (fr)
Other versions
WO2000041319A2 (en
Inventor
Louis A Stilp
Joseph W Sheenan
Tim J Harris
Jeffrey F Bull
Robert J Anderson
Original Assignee
Trueposition Inc
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
Priority claimed from US09/227,764 external-priority patent/US6184829B1/en
Application filed by Trueposition Inc filed Critical Trueposition Inc
Priority to AU31205/00A priority Critical patent/AU3120500A/en
Publication of WO2000041319A2 publication Critical patent/WO2000041319A2/en
Publication of WO2000041319A3 publication Critical patent/WO2000041319A3/en

Links

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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G01S5/021—Calibration, monitoring or correction
    • 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
    • G01S1/022—Means for monitoring or calibrating
    • G01S1/026—Means for monitoring or calibrating of associated receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707—Efficiency-related aspects
    • H04B2201/7071—Efficiency-related aspects with dynamic control of receiver resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

A demodulator for use in a signal collection system (10) of a Wireless Location System comprises a digital signal processor (DSP), a memory (14) containing coded instructions for use by the DSP in demodulating signals that are modulated in accordance with any one of a plurality of modulation schemes and drop and insert (D/I) units (11A, 11B) are used to interface fractional T1/E1 lines to full T1/E1 lines, which in turn are coupled to a digital access and control system (DACS) 13A. The plurality of modulation schemes may include AMPS, TDMA, CDMA, and/or GSM modulation protocols.
PCT/US1999/029581 1999-01-08 1999-12-13 Multiple demodulation protocols for a wireless location system WO2000041319A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31205/00A AU3120500A (en) 1999-01-08 1999-12-13 Multiple demodulation protocols for a wireless location system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/227,764 1999-01-08
US09/227,764 US6184829B1 (en) 1999-01-08 1999-01-08 Calibration for wireless location system
US22821599A 1999-01-11 1999-01-11
US09/228,215 1999-01-11

Publications (2)

Publication Number Publication Date
WO2000041319A2 WO2000041319A2 (en) 2000-07-13
WO2000041319A3 true WO2000041319A3 (en) 2000-09-21

Family

ID=26921734

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/029581 WO2000041319A2 (en) 1999-01-08 1999-12-13 Multiple demodulation protocols for a wireless location system

Country Status (2)

Country Link
AU (1) AU3120500A (en)
WO (1) WO2000041319A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8838139B2 (en) 1999-01-08 2014-09-16 Trueposition, Inc. Advanced triggers for location-based service applications in a wireless location system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110703184A (en) * 2019-10-22 2020-01-17 四川九洲空管科技有限责任公司 Full-digital Doppler very-high-frequency omnidirectional beacon system
CN111917796B (en) * 2020-08-12 2022-04-26 怀化建南电子科技有限公司 Power grid equipment communication method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251232A (en) * 1991-03-06 1993-10-05 Mitsubishi Denki Kabushiki Kaisha Radio communication apparatus
US5553101A (en) * 1993-10-28 1996-09-03 Motorola Demodulation logic unit adaptable to multiple data protocols
US5577087A (en) * 1991-10-31 1996-11-19 Nec Corporation Variable modulation communication method and system
US5668837A (en) * 1993-10-14 1997-09-16 Ericsson Inc. Dual-mode radio receiver for receiving narrowband and wideband signals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251232A (en) * 1991-03-06 1993-10-05 Mitsubishi Denki Kabushiki Kaisha Radio communication apparatus
US5577087A (en) * 1991-10-31 1996-11-19 Nec Corporation Variable modulation communication method and system
US5668837A (en) * 1993-10-14 1997-09-16 Ericsson Inc. Dual-mode radio receiver for receiving narrowband and wideband signals
US5553101A (en) * 1993-10-28 1996-09-03 Motorola Demodulation logic unit adaptable to multiple data protocols

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8838139B2 (en) 1999-01-08 2014-09-16 Trueposition, Inc. Advanced triggers for location-based service applications in a wireless location system
US9288628B2 (en) 1999-01-08 2016-03-15 Trueposition, Inc. Advanced triggers for location-based service applications in a wireless location system

Also Published As

Publication number Publication date
AU3120500A (en) 2000-07-24
WO2000041319A2 (en) 2000-07-13

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