[특허]Navigation and positioning system and method using uncoordinated becon signals

[미국특허] Navigation and positioning system and method using uncoordinated becon signals 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/185 G01S-005/02
출원번호	US-0614093 (1996-03-12)
발명자 / 주소	Kelley David C. (Orange CA) Cisneros Joseph (Glendora CA) Greenbaum Louis A. (Redondo Beach CA)
출원인 / 주소	Pinterra Corporation (Garden Grove CA 02)
인용정보	피인용 횟수 : 117 인용 특허 : 14

초록 ▼

A positioning system uses a multiplicity of commercial broadcast stereo FM radio signal transmitters, at known fixed locations, each of which transmits a beacon signal having a phase that is un-synchronized with the phases of the beacon signals of the other transmitters. All the beacon signals have a frequency approximately equal to a 19 KHz. A fixed position observer unit, positioned at a known location, receives the beacon signals from all the transmitters in the vicinity, determines their relative phases, and broadcasts data representing these relative phases. Mobile units, at unknown locations, receive these broadcast values, as well as beacon signals from at least three radio transmitters. Each mobile unit includes phase detection circuitry that detects the phases of the beacon signals at the mobile receivers current position. This is accomplished using a single radio signal receiver. A digital phase-locked loop, coupled to the radio signal receiver, generates a phase error signal for each beacon signal. The phase error signals are then used to compute a distinct phase value for each beacon signal. In the preferred embodiment, each mobile receiver includes a computer for computing its location based on the broadcast relative phase values and the detected phases. In yet another embodiment a common timing signal is provided to the fixed observer unit and to the mobile units in order to establish a common time basis throughout the positioning system, thereby facilitating determination of an initial position for each mobile unit.

대표청구항 ▼

In a positioning system that makes use of a multiplicity of transmitters, at known fixed locations, each of which transmits a beacon signal having a phase that is un-synchronized with the phases of the beacon signals of the other transmitters; each of said beacon signals having a frequency that is approximately equal to a predetermined target frequency; the combination comprising: a first receiver, at a known location relative to the locations of said multiplicity of transmitters, which (A) receives said beacon signals, (B) determines the relative phases of said beacon signals, and (C) transmits data representing said relative phases; a second receiver, at an unknown location, which receives said transmitted data from said first receiver and at least three of said beacon signals, said second receiver including phase detection circuitry for detecting the phases of said beacon signals at the location of said second receiver, and computation means for computing the location of said second receiver based on said transmitted data and said detected phases; and initialization means for providing a common timing signal to said first and second receivers in order to establish a common time basis therebetween, said initialization means including means for determining an initial estimate of said unknown location using said common time basis.

이 특허에 인용된 특허 (14) 인용/피인용 타임라인 분석

Christy Edmund H. (Metairie LA) Rouquette Robert E. (New Orleans LA) Van Doren Lawrence (San Diego CA), High frequency spread spectrum positioning system and method therefor.
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Martinez Louis (Carson CA), Integrated radio location and communication system.
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Bent Rodney B. (Indialantic FL) Casper Paul W. (West Melbourne FL), Locating system and method.
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Raoux Daniel (Bonnelles FRX), Method for positioning moving vehicles and exchanging communications between the vehicles and a central station.
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Kelley David C. (Orange CA) Cisneros Joseph (Glendora CA) Greenbaum Louis A. (Redondo Beach CA), Navigation and positioning system and method using uncoordinated beacon signals.
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Kelley David C. (Plano TX) Rackley David T. (Garland TX) Berglund Victor P. (Fairview TX), Navigation and positioning system and method using uncoordinated beacon signals.
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Kelley David C. (Plano TX) Rackley David T. (Garland TX) Berglund Victor P. (Fairview TX), Navigation and positioning system and method using uncoordinated beacon signals.
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Duffett-Smith Peter J. (Cambridgeshire GB2), Navigation and tracking system.
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Schuchman Leonard (Potomac MD) Weinberg Aaron (Potomac MD) Engelbrecht Lloyd (Reston VA), No-outage GPS/commercial RF positioning system.
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Dalabakis Eli J. (Seminole FL) Shearer Harry D. (St. Petersburg FL), Position fixing system utilizing plural commercial broadcast transmissions and having frequency correction.
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Sanderford ; Jr. H. Britton (New Orleans LA) Rouquette Robert E. (New Orleans LA) Arthur James D. (Metairie LA), Radio position determination method and apparatus.
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Crom Carol L. (Garland TX) Kelly Carl N. (Greenville TX) Tillotson Thomas C. (Greenville TX), Spectral correlation.
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Paneth Eric (Givataijm CA ILX) Handzel Mark J. (San Diego CA) Morley Steven A. (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
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Connelly, Will A., Television pulsed navigation system.
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[미국특허] Navigation and positioning system and method using uncoordinated becon signals 원문보기

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[미국특허] Navigation and positioning system and method using uncoordinated becon signals 원문보기

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