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[미국특허] Method and apparatus for rapidly estimating the doppler-error and other receiver frequency errors of global positioning system satellite signals weakened by obstructions in the signal path 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04B-007/185
  • G01S-005/02
출원번호 US-0989906 (2001-11-19)
발명자 / 주소
  • Louis H. M. Jandrell
출원인 / 주소
  • Fast Location.Net, LLC
대리인 / 주소
    Baker Botts L.L.P.
인용정보 피인용 횟수 : 12  인용 특허 : 79

초록 ▼

Frequency-offset components are extracted from a set of digitized samples of signals transmitted by a satellite. The samples are squared to produce squared samples and decimated. The squared samples are auto-correlated to produce an auto-correlate, and the auto-correlate is truncated. The truncated

대표청구항 ▼

1. A method for determining the received frequency of a signal transmitted at a known frequency, comprising:digitizing the received signal to produce a digitized signal; squaring the digitized signal to produce a squared signal; analyzing the squared signal for spectral components; and scaling the s

이 특허에 인용된 특허 (79) 인용/피인용 타임라인 분석

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이 특허를 인용한 특허 (12) 인용/피인용 타임라인 분석

  1. Stein,Jeremy M.; Weissman,Haim, Method and apparatus for estimating the position of a terminal based on identification codes for transmission sources.
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  2. Yang, Shi-Xian, Method and apparatus of correcting clock drift error.
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  3. Bromley, Patrick G.; Jandrell, Louis H. M.; Wise, Michael D., Method and system for processing positioning signals based on predetermined message data segment.
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  4. Bromley, Patrick G.; Jandrell, Louis H. M.; Wise, Michael D., Method and system for processing positioning signals based on predetermined message data segment.
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  5. Bromley, Patrick G.; Jandrell, Louis H. M.; Wise, Michael D., Method and system for processing positioning signals based on predetermined message data segment.
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  6. Bromley, Patrick G.; Jandrell, Louis H. M.; Wise, Michael D., Method and system for processing positioning signals based on predetermined message data segment.
    상세보기
  7. Bromley,Patrick G.; Jandrell,Louis H. M.; Wise,Michael D., Method and system for processing positioning signals based on predetermined message data segment.
    상세보기
  8. Jandrell,Louis Henry Martin, Method and system for processing positioning signals in a stand-alone mode.
    상세보기
  9. Khandekar, Aamod Dinkar; Palanki, Ravi; Sampath, Ashwin; Bhushan, Naga; Bachu, Raja Sekhar, Positioning in the presence of passive distributed elements.
    상세보기
  10. Fischer, Sven, Positioning reference signal (PRS) generation for multiple transmit antenna systems.
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  11. Fischer, Sven, Positioning reference signal (PRS) generation for multiple transmit antenna systems.
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  12. Brown, Jim; Zhang, Gengsheng; Garin, Lionel, Synchronizing a radio network with end user radio terminals.
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