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Digital receiver with tunable analog filter and method therefor

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04L-027/06
  • H04L-027/08
출원번호 US-0820084 (1997-03-19)
발명자 / 주소
  • Liebetreu John Michael
  • Brombaugh Eric Martin
  • Palmer Wyn T.
출원인 / 주소
  • SiCom, Inc.
대리인 / 주소
    Meschkow & Gresham,P.L.C.Gresham
인용정보 피인용 횟수 : 28  인용 특허 : 17

초록

A digital data receiver includes a tunable analog matched filter circuit having a variable bandwidth responsive to the bit error rate (BER) of the decoded data. The bandwidth of the analog filtering circuit is controlled by a tuning control signal that includes a coarse tuning signal combined with a

대표청구항

[ What is claimed is:] [1.] A method for processing a received data communication signal, said method comprising the steps of:filtering an analog signal derived from an RF data communication signal and configured to convey digital data, said filtering step being performed by an analog filtering circ

이 특허에 인용된 특허 (17)

  1. Braegas Peter (Hildesheim DEX), AM radio receiver with switchable IF bandwidth.
  2. Hsiung Chia Y. (Phoenixville PA) Ross Daniel P. (Philadelphia PA), Adaptive carrier tracking circuit.
  3. Duong Minh H. (Skokie IL) Dorsey Donald A. (Vernon Hills IL) Johnson ; Jr. Robert M. (Lake Zurich IL), Apparatus for detecting a signaling channel during scanning including a controlled frequency converter circuit and a con.
  4. Go Young D. (Seoul KRX), Automatic frequency control system.
  5. Nakamura Shigeki (Kawasaki JPX) Takahashi Yasufumi (Yokohama JPX), Carrier recovery phase-locked loop.
  6. Mohindra Rishi (Eindhoven NLX), Direct conversion receiver.
  7. Hansen Jens (Berlin DEX), FM receiver having variable IF filter.
  8. Matsumoto Yutaka (Yokohama JPX), Frequency modulation receiving apparatus having two intermediate-frequency band pass filters.
  9. Cahill Stephen V. (Palatine IL), Interference reduction using an adaptive receiver filter, signal strength, and BER sensing.
  10. Kaleh Ghassan K. (46 ; rue Barrault 75634 Paris Cedex 13 FRX), MSK modulation and differentially coherent detection transmission system.
  11. Hiben Bradley M. (Glen Ellyn IL) Newberg Donald G. (Schaumburg IL) Logalbo Robert D. (Bartlett IL), Method and apparatus for automatic frequency and bandwidth control.
  12. Baker Kenneth L. (Littleton CO), Method for optimizing the bandwidth of a radio receiver.
  13. Figura John A. (St. Peters MO) Eidelman Harry (St. Louis MO), Modular receiver for signals having multiple channels and multiple formats.
  14. Hillum Richard A. (Laindon GBX) Parry Ian S. (Richmond GBX), Radio communication.
  15. Vogt Lothar (Hohenhameln DEX) Bartels Stefan (Hildesheim DEX) Arnold Rainer (Sibbesse DEX) Schwarz Detlef (Hanover DEX), Radio receiver adjacent-channel interference suppression circuit.
  16. Behrens Richard T. (Louisville CO) Anderson Kent D. (Westminster CO) Armstrong Alan (Longmont CO) Dudley Trent (Littleton CO) Foland Bill (Littleton CO) Glover Neal (Broomfield CO) King Larry (Boulde, Synchronous read channel.
  17. Myer Robert E. (Denville NJ), Varying bandwidth digital signal detector.

이 특허를 인용한 특허 (28)

  1. Kroeger,Brian William, Adjacent channel interference mitigation for FM digital audio broadcasting receivers.
  2. Holden Alan R. ; Montalvo Antonio ; Myers Richard H., Apparatus and methods for tuning bandpass filters.
  3. Bois, Karl J.; Toby, Benjamin; Kopp, David P., Bit error ratio tests.
  4. Salvi, Raul, Broadband input frequency adaptive technique for filter tuning and quadrature generation.
  5. Aman Ahmad K. ; Farrow Cecil William ; Jiang Hong ; Primatic ; Jr. Agesino ; Webb ; III Charles Albert, Carrier recovery system.
  6. McCallister Ronald D. ; Cochran Bruce A., Communication system with end-to-end quadrature balance control.
  7. Obata,Koji; Oishi,Noriaki; Sato,Tomoyuki; Nitta,Hajime; Ota,Kiyoshi, Data multiplexer, data multiplexing method, and recording medium.
  8. Mason,Ralph; DeVries,Chris, Directly tuned filter and method of directly tuning a filter.
  9. McCallister,Ronald Duane, Distortion-managed digital RF communications transmitter and method therefor.
  10. Bollenbeck, Jan; Oppelt, Ralph, Filter circuit arrangement.
  11. Lakkis, Ismail Adnan, Method and apparatus for adaptive image rejection.
  12. Hoffmann,Theodore J.; Mulbrook,Mark M., Method and apparatus for automatic center frequency tuning of tunable bandpass filters.
  13. He, Runsheng, Method and apparatus for controlling a local oscillator.
  14. Yamauchi,Ken, Method and apparatus for decoding received data in a communications system.
  15. Nanni, Peter, Method and apparatus for interfering receiver signal overload protection.
  16. Haub, David Ryan, Multimode receiver control method and apparatus.
  17. McCallister,Ronald Duane, Predistortion circuit and method for compensating A/D and other distortion in a digital RF communications transmitter.
  18. McCallister,Ronald Duane, Predistortion circuit and method for compensating nonlinear distortion in a digital RF communications transmitter.
  19. McCallister, Ronald Duane; Brombaugh, Eric M., RF transmitter with predistortion and method therefor.
  20. Ellis, Timothy Francis, Robust servo demodulation filtering method.
  21. Fulghum, Tracy L.; Khayrallah, Ali S., Soft output value biasing.
  22. McCallister,Ronald Duane; Brombaugh,Eric M., Transmitter predistortion circuit and method therefor.
  23. Yeo,Alan Chin Leong; Tan,Han Leng Paxton; Brekelmans,Johannes Hubertus Antonius, Tuner alignment.
  24. Cowley,Nicholas Paul; Coe,Peter, Tuner for reception of a broadband radio frequency signal.
  25. Gupta, Deepnarayan, Wideband digital spectrometer.
  26. Gupta, Deepnarayan, Wideband digital spectrometer.
  27. Gupta, Deepnarayan, Wideband digital spectrometer.
  28. Gupta, Deepnarayan, Wideband digital spectrometer.
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