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Method and apparatus for despreading a spread spectrum signal at baseband

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H03D-001/24
출원번호 US-0434530 (1982-10-14)
발명자 / 주소
  • Mosley William H. (St. Petersburg FL) Sanders David E. (St. Petersburg FL)
출원인 / 주소
  • E-Systems, Inc. (Dallas TX 02)
인용정보 피인용 횟수 : 40  인용 특허 : 3

초록

A baseband correlation circuit (10) receives an IF spread spectrum input signal which is phase compared with a local oscillator signal and a phase shifted local oscillator signal to produce I channel and Q channel spread baseband signals. Each of these signals is input to four sample and hold circui

대표청구항

A baseband correlator circuit for despreading a spread spectrum signal, comprising; means for translating said spread spectrum signal to baseband to produce an I (in-phase) channel baseband signal and a Q (quadrature) channel baseband signal, said spread spectrum signal utilizing a pseudonoise (PN)

이 특허에 인용된 특허 (3)

  1. Frosch ; Robert A. Administrator of the National Aeronautics and S pace ; Administration with respect to an invention of ; Hopkins ; Ph illip M., Apparatus and method for stabilized phase detection for binary signal tracking loops.
  2. Albanese Damian F. (Chatsworth CA) Klein Albert M. (Chatsworth CA), PRC/FM CW Radar system.
  3. Bowles William M. (Arlington MA) Cox ; Jr. Duncan B. (Beverly MA) Guinon Walter J. (Newburyport MA), Pseudo-random-number-code-detection and tracking system.

이 특허를 인용한 특허 (40)

  1. Schilling Donald L. (Sands Point NY), Adaptive power control for a spread spectrum communications system and method.
  2. Donald L. Schilling, CDMA communications and geolocation system and method.
  3. Schilling Donald L., CDMA communications and geolocation system and method.
  4. Schilling Donald L. (Sands Point NY), CDMA/TDMA spread-spectrum communications system and method.
  5. Zehavi Ephraim,ILX ; Willenegger Serge ; Odenwalder Joseph P., Coherent signal processing for CDMA communication system.
  6. Zehavi Ephraim,ILX ; Willenegger Serge ; Odenwalder Joseph P., Coherent signal processing for CDMA communication system.
  7. Schilling, Donald L., High capacity spread spectrum channel.
  8. Odenwalder, Joseph P., High data CDMA wireless communication system using variable sized channel codes.
  9. Joseph P. Odenwalder, High data rate CDMA wireless communication system.
  10. Joseph P. Odenwalder ; Yu-Cheun Jou ; Edward G. Tiedemann, Jr., High data rate CDMA wireless communication system.
  11. Odenwalder Joseph P. ; Jou Yu-Cheun ; Tiedemann ; Jr. Edward G., High data rate CDMA wireless communication system.
  12. Odenwalder, Joseph P., High data rate CDMA wireless communication system.
  13. Odenwalder, Joseph P., High data rate CDMA wireless communication system using variable sized channel codes.
  14. Odenwalder, Joseph P., High data rate CDMA wireless communication system using variable sized channel codes.
  15. Odenwalder, Joseph P., High data rate CDMA wireless communication system using variable sized channel codes.
  16. Odenwalder, Joseph P., High rate CDMA wireless communication system using variable sized channel codes.
  17. Omura Jimmy K. (Cupertino CA) Yang Paul T. (Sunnyvale CA) Khachatrian Gurgen H. (Yerevan AMX) Nikogossian Karen M. (Yerevan AMX) Hovakimian Karen S. (Yerevan AMX) Vartapetian Armen L. (Yerevan AMX), MSK spread-spectrum receiver which allows CDMA operations.
  18. Omura Jimmy K. ; Yang Paul T. ; Khachatrian Gurgen H.,AMX ; Nikogossian Karen M.,AMX ; Hovakimian Karen S.,AMX ; Vartapetian Armen L.,AMX, MSK spread-spectrum receiver which allows CDMA operations.
  19. Omura Jimmy K. ; Yang Paul T. ; Khachatrian Gurgen H.,AMX ; Nikogossian Karen M.,AMX ; Hovakimian Karen S.,AMX ; Vartapetian Armen L.,AMX, MSK spread-spectrum receiver which allows CDMA operations.
  20. Counselman ; III Charles C. (Belmont MA), Multi-antenna gas receiver for seismic survey vessels.
  21. Borth David E. (Palatine IL) Wang Chih-Fei (Arlington Heights IL) Rabe Duane C. (Rolling Meadows IL) Labedz Gerald P. (Chicago IL), Phase-coherent TDMA quadrature receiver for multipath fading channels.
  22. Odenwalder, Joseph P.; Jou, Yu-Cheun; Tiedemann, Jr., Edward G., Receiver method and apparatus with complex pilot filter.
  23. Odenwalder, Joseph P.; Jou, Yu-Cheun; Tiedemann, Jr., Edward G., Receiver method and apparatus with complex pilot filter.
  24. Odenwalder Joseph P., Reduced peak-to-average transmit power high data rate CDMA wireless communication system.
  25. Schilling Donald L. ; Garodnick Joseph ; Lomp Gary ; Moore ; III Timothy F., Spread spectrum adaptive power control communications system and method.
  26. Schilling, Donald L., Spread spectrum adaptive power control communications system and method.
  27. Schilling, Donald L., Spread spectrum base station.
  28. Schilling,Donald L., Spread spectrum communication system and method using a reference signal and a plurality of message signals.
  29. Schilling,Donald L., Spread spectrum communications using a reference and a message signal system and method.
  30. Schilling, Donald L., Spread spectrum remote unit.
  31. Cantwell Robert H. (Sudbury MA), Spread spectrum signal detector.
  32. Chiu Chen-Shu (Placentia CA), Synchronization preamble correlation detector and frequency estimator.
  33. Gilhousen, Klein S.; Jacobs, Irwin M.; Padovani, Roberto; Weaver, Jr., Lindsay A.; Wheatley, III, Charles E.; Viterbi, Andrew J., System and method for generating signal waveforms in a CDMA cellular telephone system.
  34. Gilhousen, Klein S.; Jacobs, Irwin M.; Padovani, Roberto; Weaver, Jr., Lindsay A.; Wheatley, III, Charles E.; Viterbi, Andrew J., System and method for generating signal waveforms in a CDMA cellular telephone system.
  35. Gilhousen, Klein S.; Jacobs, Irwin M.; Padovani, Roberto; Weaver, Jr., Lindsay A.; Wheatley, III, Charles E.; Viterbi, Andrew J., System and method for generating signal waveforms in a CDMA cellular telephone system.
  36. Gilhousen,Klein S.; Jacobs,Irwin M.; Padovani,Roberto; Weaver, Jr.,Lindsay A.; Wheatley, III,Charles E.; Viterbi,Andrew J., System and method for generating signal waveforms in a CDMA cellular telephone system.
  37. Counselman ; III Charles C., System for determining position from pseudorandomly modulated radio signals.
  38. Arthur James D. (Costa Mesa CA) Sanderford ; Jr. H. Britton (New Orleans LA) Rouquette Robert E. (Kenner LA), Wireless alarm system.
  39. Arthur James D. (Costa Mesa CA) Sanderford ; Jr. H. Britton (New Orleans LA) Rouquette Robert E. (Kenner LA), Wireless alarm system.
  40. Sanderford H. Britton ; Rouquette Robert E. ; Arthur James D., Wireless alarm system.
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