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Bandpass correlation of a spread spectrum signal 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04L-027/30
출원번호 US-0880578 (1997-06-23)
발명자 / 주소
  • Erik A. Ramberg
  • Robert K. Froelich
  • Forrest F. Fulton
출원인 / 주소
  • Cellnet Data Systems, Inc.
대리인 / 주소
    Fish & Richardson, P.C.
인용정보 피인용 횟수 : 44  인용 특허 : 41

초록 ▼

A spread spectrum signal is processed after it is sampled at a selected sampling rate and tuned to a center frequency lower than the sampling rate and greater than zero. The signal is multiplied against a reference signal to produce a corresponding product output, and an accumulation output is forme

대표청구항 ▼

1. An apparatus for use in processing a spread spectrum signal digitally sampled at a preselected sampling rate, the apparatus comprising:a tuning element configured to downconvert the digitally sampled spread spectrum signal to a preselected center frequency which is a whole number fraction of the

이 특허에 인용된 특허 (41)

  1. Mittel James Gregory, Apparatus for deriving in-phase and quadrature-phase baseband signals from a communication signal.
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  2. Stewart Kenneth A. (Palatine IL) Love Robert T. (Barrington IL), Apparatus for performing frequency conversion in a communication system.
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  3. Lundquist Alan E. (Salt Lake City UT) Zscheile ; Jr. John W. (West-Farmington UT) Kingston Samuel C. (Salt Lake City UT), Asynchronous samples data demodulation system.
    상세보기
  4. Schuchman Leonard (Potomac MD) Weinberg Aaron (Potomac MD), Charge-coupled-device based data-in-voice modem.
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  5. Lomp Gary ; Ozluturk Fatih ; Silverberg Avi, Code sequence generator in a CDMA modem.
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  6. Yanagi Shuzo,JPX, Code-division-multiple-access (CDMA) receiver and method with DC component removal.
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  7. Zscheile ; Jr. John W. (Murray UT) Spencer Billie M. (Bountiful UT), Coding method and system with enhanced security.
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  8. Russell James L. (Germantown MD), Correlation data communications system.
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  9. Dohi Tomohiro (Yokohama JPX) Sawahashi Mamoru (Yokosuka JPX) Adachi Fumiyuki (Yokohama JPX), Correlation detector and communication apparatus.
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  10. Kaku Tomoya (Tokyo JPX) O\Regan Sean (Tokyo JPX), DS/CDMA receiver using parallel-operating multi-purpose correlators.
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  11. Murai Hideshi (Kamakura JPX), Data demodulator of a receiving apparatus for spread spectrum communication.
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  12. Nuytkens Peter (Watertown MA), Digital direct sequence spread spectrum receiver.
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  13. Chalmers Harvey (Rockville MD), Digital downconverter/despreader for direct sequence spread spectrum communications system.
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  14. Janc Robert V. (Palos Heights IL) Jasper Steven C. (Hoffman Estates IL), Digital global positioning system receiver.
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  15. Chung Sunguoon (San Diego CA) Czaja Stash (Cardiff CA), Double dwell maximum likelihood acquisition system with continuous decision making for CDMA and direct spread spectrum s.
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  16. Tzou Ching-Kae,TWX, Efficient demodulation scheme for DSSS communication.
    상세보기
  17. Lampert Ernst (Unterpfaffenhofen DEX), Electric circuit for the production of a number of different codes.
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  18. Davidov Mircho A. (Alamo CA) Fulton Forrest F. (Los Altos CA), Frequency synchronized bidirectional radio system.
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  19. Love Robert T. (Barrington IL) Stewart Kenneth A. (Palatine IL) Rapala Bryan (Mt. Prospect IL), Method and apparatus for multi-phase component downconversion.
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  20. Sutton Todd R., Method and apparatus for performing search acquisition in a CDMA communication system.
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  21. Bar-David Israel (Haifa ILX), Method and apparatus for spread spectrum code pulse position modulation.
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  22. Zehavi Ephraim (Haifa ILX) Carter Stephen S. (San Diego CA) Gilhousen Klein S. (Bozeman MT), Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking in.
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  23. van de Pas Andries J. M. (Eindhoven NLX) van den Ende Antonius C. J. (Eindhoven NLX), Method of coding and decoding messages.
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  24. Kingston Samuel C. ; Giallorenzi Thomas R. ; Sylvester Randal R. ; Matolak David W. ; Smith Patrick J., Multi-user acquisition procedure for point-to-multipoint synchronous CDMA systems.
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  25. Thielecke Jorn,DEX ; Granzow Wolfgang,DEX, Multiple access digital transmission system and a radio base station and a receiver for use in such a system.
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  26. Durrant Randolph L. ; Burbach Mark T. ; Jensen Ryan N. ; Scott Logan ; Williams Claude M., Non-coherent spread-spectrum continuous-phase modulation communication system.
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  27. Magill David T. (Palo Alto CA), Orthogonal code tracking system having phantom carrier signal.
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  28. Sunstein Drew E. (19 Parkhurst Dr. Nashua NH 03060), Programmable correlator.
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  29. Frazier ; Jr. William R. (Indialantic FL), Programmable time invariant coherent spread symbol correlator.
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  30. Fenton Patrick (Calgary CAX), Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time.
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  31. Dent Paul W. (Stehags SEX), Quantized coherent rake receiver.
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  32. Beier Wolfgang (Weil der Stadt DEX), Receiver for bandspread signals.
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  33. Skinner ; deceased Gordon (late of Boulder CO by Margo Boodakian ; legal representative ) Harms Brian (Superior CO), Signal acquisition in a multi-user communication system using multiple walsh channels.
    상세보기
  34. Yamamoto Michio (Mobara JPX), Spectrum spread receiver and spectrum spread transmitter-receiver including same.
    상세보기
  35. Fukushi Mikio (Tokyo JPX) Tomita Hideho (Tokyo JPX), Spectrum spread signal reception with differential demodulation of spectrum spread demodulated components at each synchr.
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  36. Bar-David Israel (Haifa ILX) Krishnamoorthy Rajeev (Rotterdam NLX), Spread spectrum code pulse position modulated receiver having delay spread compensation.
    상세보기
  37. Andren Carl F. (Indialantic FL) Olaker David A. (Palm Bay FL), Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform.
    상세보기
  38. Cahn Charles R. ; Kohli Sanjai, Spread spectrum receiver with multi-path cancellation.
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  39. Chiu Chen-Shu (Placentia CA), Synchronization preamble correlation detector and frequency estimator.
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  40. Jerrim John W. (Lilburn GA), Synchronization system for use in direct sequence spread spectrum signal receiver.
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  41. Denton D. Darryl (Cupertino CA) Lau Douglas (Hillsborough CA), Wireless frequency-division-multiple-access direct sequence spread spectrum telephone system.
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  23. Makinson, David N.; Lancaster, Andrew; Swanson, Scott, Load side voltage sensing for AMI metrology.
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  28. Borisov, Vladimir; Pontin, Joseph, RF local area network antenna design.
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  29. Borisov, Vladimir; Pontin, Joseph, RF local area network antenna design.
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  30. Picard, Gilles, Real time clock distribution and recovery.
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  31. Picard, Gilles, Real time clock distribution and recovery.
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  32. Walton, J. Rodney; Wallace, Mark S., Receiver for wireless communication network with extended range.
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  33. Walton, J. Rodney; Wallace, Mark S., Receiver for wireless communication network with extended range.
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  34. Walton, Jay Rodney; Wallace, Mark S., Receiver for wireless communication network with extended range.
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  35. Dent, Paul W.; Barrow, David, Simplified finite impulse response (FIR) digital filter for direct sequencespread spectrum communication.
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  36. Monnerie, Emmanuel, Systems and methods for signal modulation and demodulation using phase.
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  38. Picard, Gilles, Traffic load control in a mesh network.
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  40. Van Wyk, Hartman; Picard, Gilles; Monier, Fabrice; Clave, Arnaud; Bartier, Jerome, Uplink routing without routing table.
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  43. Picard, Gilles, Use of minimal propagation delay path to optimize a mesh network.
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  44. Picard, Gilles, Use of minimal propagation delay path to optimize a mesh network.
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