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Distributed arithmetic digital filter in a partial-response maximum-likelihood disk drive system 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06F-015/31
출원번호 US-0851817 (1992-03-16)
발명자 / 주소
  • Coker Jonathan D. (Rochester MN) Galbraith Richard L. (Rochester MN) Ziperovich Pablo A. (San Diego CA)
출원인 / 주소
  • International Business Machines Corporation (Armonk NY 02)
인용정보 피인용 횟수 : 32  인용 특허 : 0

초록

A 10-tap finite impulse response (FIR) digital filter is provided in a partial response signaling and maximum-likelihood (PRML) data channel. A plurality of partial sums of predetermined tap weights are stored in a palette random access memory (RAM). A fixed qualifier value is received and used toge

대표청구항

A finite impulse response (FIR) digital filter comprising: means for storing a plurality of partial sums of predetermined tap weights; means for receiving a fixed qualifier value; means for calculating a predetermined tap weight using selected ones of said stored partial sums and said received fixed

이 특허를 인용한 특허 (32)

  1. Lomp, Gary R., Adaptive vector correlator for spread-spectrum communications.
  2. Gary R. Lomp, Adaptive vector correlator using weighting signals for spread-spectrum communications.
  3. Ozluturk, Faith M.; Lomp, Gary R.; Kowalski, John, Apparatus for adaptive reverse power control for spread-spectrum communications.
  4. Ozluturk,Fatih M.; Lomp,Gary R.; Kowalski,John, Apparatus for initial power control for spread-spectrum communications.
  5. Lomp, Gary R.; Ozluturk, Faith M.; Kowalski, John, Automatic power control system for a code division multiple access (CDMA) communications system.
  6. Lomp,Gary; Ozluturk,Fatih; Kowalski,John, Automatic power control system for a code division multiple access (CDMA) communications system.
  7. Ozluturk, Fatih M.; Lomp, Gary R., Centroid tracking for spread-spectrum communications.
  8. Foland ; Jr. William R. ; Behrens Richard T. ; Armstrong Alan J. ; Glover Neal, Channel quality.
  9. Foland ; Jr. William R. ; Behrens Richard T. ; Armstrong Alan J. ; Glover Neal, Channel quality circuit employing a test pattern generator in a sampled amplitude read channel for calibration.
  10. Behrens Richard T. ; Bliss William G. ; Foland ; Jr. William R., Channel quality circuit in a sampled amplitude read channel.
  11. Ozluturk, Fatih M.; Jacques, Alexander M.; Lomp, Gary R.; Kowalski, John, Code division multiple access (CDMA) communication system.
  12. Regis, Robert T., Efficient multichannel filtering for CDMA modems.
  13. Regis, Robert T., Efficient multichannel filtering for CDMA modems.
  14. Robert T. Regis, Efficient multichannel filtering for CDMA modems.
  15. Lomp, Gary R.; Ozluturk, Faith, Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system.
  16. Bush Gregory S. ; Cideciyan Roy D.,CHX ; Coker Jonathan D. ; Eleftheriou Evangelos S.,CHX ; Galbraith Richard L. ; Stanek David J., Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD).
  17. Ozluturk,Fatih M.; Lomp,Gary R.; Kowalski,John, Initial power control for spread-spectrum communications.
  18. Lomp,Gary R., Median weighted tracking for spread-spectrum communications.
  19. Ozluturk, Fatih; Lomp, Gary R.; Kowalski, John, Method and apparatus for adaptive power control for spread-spectrum communications.
  20. Zeng, Weining, Method and apparatus for adjusting digital filter taps based upon minimization of viterbi margin counts.
  21. Abraham David William ; Chainer Timothy Joseph ; Etzold Karl-Friedrich ; Ottesen Hal Hjalmar ; Smith Gordon James, Method and apparatus for calibrating a thermal response of a magnetoresistive element.
  22. Norman John M.ang.rten,SEX, Method and apparatus for conditionally combining bit metrics in a communication system.
  23. Coker Jonathan Darrel ; Eleftheriou Evangelos S.,CHX ; Galbraith Richard Leo ; Hirt Walter,CHX, Method and apparatus for data detection for PRML data channels.
  24. Smith Gordon J. ; Ottesen Hal Hjalmar ; Abraham David William ; Praino Anthony Paul ; Re Mark Edward ; Wickramasinghe Hemantha Kumar, Method and apparatus for separating magnetic and thermal components from an MR read signal.
  25. Ozluturk, Fatih; Lomp, Gary, Method and subscriber unit for performing power control.
  26. Ozluturk, Fatih M.; Lomp, Gary R.; Kowalski, John, Method for adaptive forward power control for spread-spectrum communications.
  27. Ozluturk, Faith M.; Lomp, Gary R.; Kowalski, John, Method for adaptive reverse power control for spread-spectrum communications.
  28. Ozluturk, Fatih M.; Lomp, Gary R.; Kowalski, John, Method for initial power control for spread-spectrum communications.
  29. Coker Jonathan Darrel ; Eleftheriou Evangelos Stavros,CHX ; Galbraith Richard Leo ; Hirt Walter,CHX, Noise predictive maximum likelihood (NPML) detection methods and apparatus based thereon.
  30. Ozluturk,Fatih M.; Lomp,Gary R., System for using rapid acquisition spreading codes for spread-spectrum communications.
  31. Ohmori Hideki,JPX ; Kanegae Masahide,JPX ; Tomita Isamu,JPX, Thermal asperity detection method, thermal asperity compensation method, magnetic disk unit and retry method therefor.
  32. Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Transferring voice and non-voice data.
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