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Coherent signal processing for CDMA communication system

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H03D-001/00
출원번호 US-0687899 (1996-07-29)
발명자 / 주소
  • Zehavi Ephraim,ILX
  • Willenegger Serge
  • Odenwalder Joseph P.
출원인 / 주소
  • Qualcomm Inc.
대리인 / 주소
    Miller
인용정보 피인용 횟수 : 20  인용 특허 : 21

초록

A novel and improved method and apparatus for coherently processing a CDMA signal without the use of pilot or other synchronization information is described. By utilizing a coherent receive processing system, a reverse link signal can be properly processed when received at a lower power level than t

대표청구항

[ We claim:] [1.] A method for receive processing a set of multipath signals comprising the steps of:a) calculating a set of phase references corresponding to the set of multipath signals;b) projecting said set of multipath signals using said set of phase references yielding a set of projected multi

이 특허에 인용된 특허 (21)

  1. Osborne Eugene F. (Westminster MD), Carrier-modulated coherency monitoring system.
  2. Cooper George R. (West Lafayette IN) Nettleton Raymond W. (West Lafayette IN) Grybos David P. (West Lafayette IN), Demodulator unit for spread spectrum apparatus utilized in a cellular mobile communication system.
  3. Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatly ; III Charles E. (Del Mar CA), Diversity receiver in a CDMA cellular telephone system.
  4. Zehavi Ephraim (San Diego CA), Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communicatio.
  5. Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system.
  6. Mosley William H. (St. Petersburg FL) Sanders David E. (St. Petersburg FL), Method and apparatus for despreading a spread spectrum signal at baseband.
  7. Schaffner T. Michael (Palatine IL) Bayer William R. (Palatine IL) Bach Michael J. (Niles IL), Method and apparatus for encoding and decoding a supplementary signal.
  8. Lipa Robert A. (Aurora IL), Method and apparatus for identifying a coded communication signal.
  9. Taylor ; Jr. Taliaferro H. (Melbourne FL), Method and apparatus for processing spread spectrum signals.
  10. Viterbi Audrey (La Jolla CA) Viterbi Andrew J. (La Jolla CA), Noncoherent receiver employing a dual-maxima metric generation process.
  11. Auchterlonie Richard C. (5701 N. Sheridan #29-Q Chicago IL 60660), Offset QPSK demodulator and receiver.
  12. Weaver ; Jr. Lindsay A. (San Diego CA), Pilot carrier dot product circuit.
  13. Ogita Minoru (Hamamatsu JA), Pilot signal extracting circuitry.
  14. Frazier ; Jr. William R. (Indialantic FL), Programmable time invariant coherent spread symbol correlator.
  15. Weinberg Aaron (Potomac MD) Ebert Paul M. (Potomac MD) Fee Joseph J. (Wheaton MD) Kaminsky Yaroslav (Herndon VA) Keblawi Feisal S. (Vienna VA) Scales Walter C. (McLean VA), Spread spectrum communications method and apparatus.
  16. Gordy Robert S. (Largo FL) Anderson Alfred T. (St. Petersburg FL) Sanders David E. (St. Petersburg FL), Spread spectrum demodulator.
  17. Stromswold Chester E. (Nashua NH) Apostolos John T. (Manchester NH), Spread spectrum detector.
  18. Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Weaver ; Jr. Lindsay A. (San Diego CA), Spread spectrum multiple access communication system using satellite or terrestrial repeaters.
  19. Kaku Tomoya (Tokyo JPX) O\Regan Sean (Tokyo JPX), Sync acquisition and tracking circuit for DS/CDMA receiver.
  20. Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
  21. Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.

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  1. Havish Koorapaty ; Ali S. Khayrallah, Apparatus and methods for allocation of high-penetration services in wireless communications systems.
  2. Khayrallah Ali S. ; Irvin David R., Apparatus and methods for assigning spectral and non-spectral resource charges in wireless communications systems.
  3. Koorapaty, Havish; Ramesh, Rajaram, Apparatus and methods for high-penetration random access in wireless communications systems.
  4. Rydbeck Nils ; Molnar Barbara ; Guey Jiann-Ching ; Khayrallah Ali ; Koilpillai R. David, Apparatus and methods for providing high-penetration messaging in wireless communications systems.
  5. Faruque Saleh ; Homayoun Fereidoun ; Maveddat Payam ; Lo Wing, Broadband wireless access based on code division parallel access.
  6. Qiang Shen CA; Peter Savinsky RU; Rui Wang CA; Wen Tong CA; Dmitry Menyailov RU; Dmitry Pogorilko RU; Alexander Garmonov RU, Carrier phase recovery of multi-rate signals.
  7. Kim,Sung jin; Lee,Kwang bok; Lee,Hyeon woo; Hwang,Keun chul; Choi,Ho kyu; Lee,Yong suk, Closed loop transmit diversity method and apparatus using complex basis vector sets for antenna selection.
  8. Wang, Xiao-an, Coherent combining/noncoherent detection (CCND) method and apparatus for detecting a pilot signal in a wireless communication system.
  9. Citta Richard W. ; Dicke Stephen M., Detection of code vectors in single frequency, multiple transmitter networks.
  10. Iwamatsu, Takanori; Fukui, Mamoru, Method and apparatus for achieving demodulation in radio communications system using M-sequence orthogonal modulation.
  11. Sun Feng-Wen, Method and apparatus for compensating for phase differences in received signals.
  12. Tan, Alfred Keng Tiong, Method and apparatus for non-linear code-division multiple access technology.
  13. Flaig, Alexander; MacMullan, Samuel; Poor, Harold V; Rao, Tandhoni S; Schwartz, Stuart; Upadhyay, Triveni N, Method and apparatus for regenerative based interference cancellation within a communication system.
  14. Takahashi, Yousuke; Ishida, Kazuhito, Method and system for terminal communication.
  15. Kim, Jaehyeong, Method for detecting forward link power control bits in a communication system.
  16. McDonough, John G.; Julian, Craig M., System and method for assigning combiner channels in spread spectrum communications.
  17. McDonough,John G.; Julian,Craig M., System and method for demodulating associated information channels in direct sequence spread spectrum communications.
  18. McDonough, John G., System and method for extracting soft symbols in direct sequence spread spectrum communications.
  19. McDonough,John G., System and method for selecting sample streams in direct sequence spread spectrum communications.
  20. Rydbeck Nils ; Molnar Barbara ; Guey Jiann-Ching ; Khayrallah Ali ; Koilpillai R. David, Wireless communications systems with standard and robust services and methods of operation thereof.
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