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Real-time signal-to-noise ratio (SNR) estimation for BPSK and QPSK modulation using the active communications channel 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04L-027/00
  • H04Q-001/20
  • H04Q-001/18
  • H04B-001/10
출원번호 US-0274756 (2002-10-21)
발명자 / 주소
  • Manning,Robert M.
출원인 / 주소
  • The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
인용정보 피인용 횟수 : 12  인용 특허 : 22

초록

초록이 없습니다.

대표청구항

대표청구항이 없습니다.

이 특허에 인용된 특허 (22)

  1. Kroeger Brian W. (Sykesville MD) Baird Jeffrey S. (Laurel MD), Automatic noise normalization and reacquisition control for a QPSK demodulator symbol tracking loop.
  2. Cai Khiem V. ; Levine ; Jr. Allan L., Communication signal processors and methods.
  3. Chiba Yoshiyuki,JPX, Digital broadcast receiver and signal level display method.
  4. Nieczyporowicz Leon L ; Giallorenzi Thomas R ; Stephenson Philip L ; Sylvester Randal R, Fixed wireless loop system having adaptive system capacity based on estimated signal to noise ratio.
  5. Dan Avidor ; Colin Alan Warwick, Frequency and phase estimation for MPSK signals.
  6. Gurusami Aravanan ; Nekhamkin Mike, Method and apparatus for improved phase shift keyed (PSK) signal demodulation.
  7. Obata Tomoji (Tokyo JPX), Method and circuit for detecting CN ratio of QPSK signal.
  8. Soliman Samir S., Method and system for providing an estimate of the signal strength of a received signal.
  9. Hideto Furukawa JP; Makoto Yoshida JP; Nami Hatazoe JP, Method for determining reference phase in radio communication system which uses orthogonal M-ary modulation, and coherent detection method using the same.
  10. Liu Qin,FIX, Method for estimating signal and noise quality, and a receiver.
  11. Pastor Dominique (Eysines FRX), Method of detecting a useful signal affected by noise.
  12. Sayeed Zulfiquar, Methods of estimating signal-to-noise ratios.
  13. Ismail Lakkis ; Deirdre O'Shea ; Masood K. Tayebi ; Baya Hatim, Non-data-aided maximum likelihood based feedforward timing synchronization method.
  14. Graupe Daniel, Non-linear deterministic stochastic filtering method and system.
  15. Altes Richard A. (La Jolla CA), Optically maximum A posteriori demodulator.
  16. Chennakeshu Sandeep (Schenectady NY) Hladik Stephen M. (Albany NY) Saulnier Gary J. (Rexford NY) Koilpllai Ravinder D. (Latham NY) Toy Raymond L. (Latham NY), Post detection selection combining diversity receivers for mobile and indoor radio channels.
  17. Philips Lieven,BEX ; Vanhoof Jan,BEX ; Wouters Maryse,BEX ; De Wulf Rik,BEX ; Derudder Veerle,BEX ; Himbeeck Carl Van,BEX ; Bolsens Ivo,BEX ; De Man Hugo,BEX ; Gyselinckx Bert,BEX, Programmable modem apparatus for transmitting and receiving digital data, design method and use method for said modem.
  18. Fleming-Dahl, Arthur, Signal amplitude restoration apparatus and method.
  19. Rozmaryn Jacob, Signal to noise and interface estimator for analog voice channel.
  20. Jalali Ahmad, Signal to noise estimation of forward link traffic channel for fast power control.
  21. Kroeger Brian W. ; Bronder Joseph B. ; Oblak Tod A. ; Baird Jeffrey S., Symbol synchronizer using modified early/punctual/late gate technique.
  22. Qiang Wu ; Peter J. Black ; Nagabhushana T. Sindhushayna, System and method for accurately predicting signal to interference and noise ratio to improve communications system performance.

이 특허를 인용한 특허 (12)

  1. Chongoushian, John H, Dynamic relay assignment for jamming mitigation in wireless networks.
  2. Li, Yunxin, Estimation of signal to noise ratio in receivers.
  3. Vazhenin, Nikolay Afanasievich; Veitsel, Andrey Vladimirovich; Veitsel, Vladimir Victorovich; Serkin, Fedor Borisovich, Method and apparatus for estimating the current signal-to-thermal noise ratio and signal-to-pulse noise ratio.
  4. Vazhenin, Nikolay Afanasievich; Veitsel, Andrey Vladimirovich; Veitsel, Vladimir Victorovich; Serkin, Fedor Borisovich, Method and apparatus for estimating the current signal-to-thermal noise ratio and signal-to-pulse noise ratio.
  5. Linn, Yair, Method and apparatus for generating a metric for use in one or more of lock detection, SNR estimation, and modulation classification.
  6. Vazhenin, Nikolay; Veitsel, Andrey; Kirianov, Ivan, Method and device for measuring the current signal-to-noise ratio when decoding LDPC codes.
  7. Vazhenin, Nikolay; Veitsel, Andrey; Kirianov, Ivan, Method and device for measuring the current signal-to-noise ratio when decoding LDPC codes.
  8. Ling, Fuyun; Mukkavilli, Krishna Kiran; Walker, Gordon Kent, Methods and apparatus for noise estimation in a communication system.
  9. Chongoushian, John H, Multiple access wireless network with low latency subnet.
  10. Stanciu, Mihai-Ionut; Crasmariu, Victor-Florin, Processor unit for determining a quality indicator of a communication channel and a method thereof.
  11. Freear, Steven; Konstantinidis, Spyros, Receiver with high performance channel estimation.
  12. Qiu,Sigang, Signal-to-noise ratio (SNR) determination in the time domain.
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