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Processing a spread spectrum signal in a frequency adjustable system 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04B-001/69
출원번호 US-0880634 (1997-06-23)
발명자 / 주소
  • Ramberg Erik A.
  • Froelich Robert K.
  • Fulton Forrest F.
출원인 / 주소
  • CellNet Data Systems, Inc.
대리인 / 주소
    Fish & Richardson P.C.
인용정보 피인용 횟수 : 74  인용 특허 : 43

초록

A spread spectrum signal sampled at a selected sampling rate is despread and accumulated in an accumulation element at a center frequency lower than the sampling rate and higher than zero. A frequency adjustment element may be used to adjust the accumulation element to have a resonant frequency appr

대표청구항

[ What is claimed is:] [1.] An apparatus for use in processing a spread spectrum signal sampled at a selected sampling rate, the apparatus comprising:a despreading element configured to receive and despread the sampled signal at a center frequency lower than the sampling rate and higher than zero;an

이 특허에 인용된 특허 (43)

  1. Mittel James Gregory, Apparatus for deriving in-phase and quadrature-phase baseband signals from a communication signal.
  2. Stewart Kenneth A. (Palatine IL) Love Robert T. (Barrington IL), Apparatus for performing frequency conversion in a communication system.
  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.
  4. Stein Seymour (Newton Center MA) DeLisle William E. (Milford MA) Schramm Karen M. (Needham MA), Carrier frequency correction for a DSSS communication system.
  5. Stein Seymour (Newton Center MA) DeLisle William F. (Milford MA) Schramm Karen M. (Needham MA), Carrier freuency corrector for a DSSS communication system.
  6. Schuchman Leonard (Potomac MD) Weinberg Aaron (Potomac MD), Charge-coupled-device based data-in-voice modem.
  7. Zarembowitch Alain (Katwijk NLX), Code acquisition process and circuit for a spread-spectrum signal.
  8. Zscheile ; Jr. John W. (Murray UT) Spencer Billie M. (Bountiful UT), Coding method and system with enhanced security.
  9. Dohi Tomohiro (Yokohama JPX) Sawahashi Mamoru (Yokosuka JPX) Adachi Fumiyuki (Yokohama JPX), Correlation detector and communication apparatus.
  10. Cowart Brooks E. (Mountain View CA), Correlator for spread spectrum communications systems.
  11. Murai Hideshi (Kamakura JPX), Data demodulator of a receiving apparatus for spread spectrum communication.
  12. Takeuchi Kunihiko (Kawasaki JPX) Oba Masao (Yokohama JPX) Horinouchi Shinichi (Yokohama JPX), Data transmission system using spread spectrum communication.
  13. Schneider Georg (Schopfheim-Langenau DEX) Freudig Gnter (Karlsruhe DEX) Rippinger Fernand (Karlsruhe DEX) Braun Hans (Karlsruhe DEX), Digital correlator.
  14. Nuytkens Peter (Watertown MA), Digital direct sequence spread spectrum receiver.
  15. Chalmers Harvey (Rockville MD), Digital downconverter/despreader for direct sequence spread spectrum communications system.
  16. Lampert Ernst (Unterpfaffenhofen DEX), Electric circuit for the production of a number of different codes.
  17. Davidov Mircho A. (Alamo CA) Fulton Forrest F. (Los Altos CA), Frequency synchronized bidirectional radio system.
  18. Brost Andrew C. (San Jose CA), High speed digital data correlator having a synchronous pipelined full adder cell array.
  19. Love Robert T. (Barrington IL) Stewart Kenneth A. (Palatine IL) Rapala Bryan (Mt. Prospect IL), Method and apparatus for multi-phase component downconversion.
  20. Sutton Todd R., Method and apparatus for performing search acquisition in a CDMA communication system.
  21. Bar-David Israel (Haifa ILX), Method and apparatus for spread spectrum code pulse position modulation.
  22. Omura Jimmy K. (Cupertino CA) Avidor Dan (Sunnyvale CA) Heising Mark (Palo Alto CA), Method and apparatus for the correlation of sample bits of spread spectrum radio signals.
  23. Omura Jimmy K. (Cupertino CA) Avidor Dan (Sunnyvale CA) Heising Mark (Palo Alto CA), Method and apparatus for the modulation of spread spectrum radio signals.
  24. Omura Jimmy K. (Cupertino CA) Avidor Dan (Sunnyvale CA) Heising Mark (Palo Alto CA), Method and apparatus for the reception and demodulation of spread spectrum radio signals.
  25. 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.
  26. van de Pas Andries J. M. (Eindhoven NLX) van den Ende Antonius C. J. (Eindhoven NLX), Method of coding and decoding messages.
  27. 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.
  28. 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.
  29. Durrant Randolph L. ; Burbach Mark T. ; Jensen Ryan N. ; Scott Logan ; Williams Claude M., Non-coherent spread-spectrum continuous-phase modulation communication system.
  30. Magill David T. (Palo Alto CA), Orthogonal code tracking system having phantom carrier signal.
  31. Sunstein Drew E. (19 Parkhurst Dr. Nashua NH 03060), Programmable correlator.
  32. Poklemba John J. (Frederick MD), Programmable noise bandwidth reduction by means of digital averaging.
  33. Frazier ; Jr. William R. (Indialantic FL), Programmable time invariant coherent spread symbol correlator.
  34. Dent Paul W. (Stehags SEX), Quantized coherent rake receiver.
  35. 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.
  36. Yamamoto Michio (Mobara JPX), Spectrum spread receiver and spectrum spread transmitter-receiver including same.
  37. Fukushi Mikio (Tokyo JPX) Tomita Hideho (Tokyo JPX), Spectrum spread signal reception with differential demodulation of spectrum spread demodulated components at each synchr.
  38. Bar-David Israel (Haifa ILX) Krishnamoorthy Rajeev (Rotterdam NLX), Spread spectrum code pulse position modulated receiver having delay spread compensation.
  39. Andren Carl F. (Indialantic FL) Olaker David A. (Palm Bay FL), Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform.
  40. Jerrim John W. (Lilburn GA), Synchronization system for use in direct sequence spread spectrum signal receiver.
  41. Clark Robert W. (Centerville OH), Synthetic demodulation of spread spectrum signals.
  42. Critchlow David N. (San Diego CA), System and method for minimizing frequency offsets between digital communication stations.
  43. Denton D. Darryl (Cupertino CA) Lau Douglas (Hillsborough CA), Wireless frequency-division-multiple-access direct sequence spread spectrum telephone system.

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  2. Eidson, Donald Brian, Accelerated selection of a base station in a wireless communication system.
  3. Cox, Earl C.; Anderton, David O.; Komaili, Jaleh; Wan, Yongbing; Walley, Scott, Adaptive wireless communication receiver.
  4. Osterloh,Christopher L.; Anderson,Benjamin L.; Cornwall,Mark K.; Delamater,Jeffrey L., Applications for a low cost receiver in an automatic meter reading system.
  5. Monier, Fabrice; Bartier, Jerome, Beacon requests and RS bit resolving circular routes.
  6. Monier, Fabrice, Broadcast acknowledgement in a network.
  7. Wang Zhaocheng,SGX ; Zhang Tao,SGX ; Ito Noriyoshi,SGX ; Sugimoto Hiroki,SGX, CDMA receiver.
  8. Makoto Sasaki JP; Takayuki Nakano JP, CDMA receiver phase tracking system.
  9. McGowan, Neil; Jin, Xin, CDMA transmit peak power reduction.
  10. Walley, Kenneth Scott; Underbrink, Paul A.; Gronemeyer, Steven A., Cancellation system and method for a wireless positioning system.
  11. Picard, Gilles, Cell isolation through quasi-orthogonal sequences in a frequency hopping network.
  12. Monier, Fabrice; Bartier, Jerome; Van Wyk, Hartman, Cell router failure detection in a mesh network.
  13. Wyk, Hartman Van; Bartier, Jerome, Cell size management.
  14. Richard Hellberg SE, Correlator receiver.
  15. Monier, Fabrice; Picard, Gilles, Crystal drift compensation in a mesh network.
  16. Monier, Fabrice, Discovery phase in a frequency hopping network.
  17. Garrison Stuber, Michael T.; Buffington, John, Distributing metering responses for load balancing an AMR network.
  18. Stuber, Michael T. Garrison; Buffington, John, Distributing metering responses for load balancing an AMR network.
  19. Gronemeyer, Steven A., Doppler corrected spread spectrum matched filter.
  20. Clave, Arnaud; Monier, Fabrice, Downlink routing mechanism.
  21. Clave, Arnaud; Monier, Fabrice, Downlink routing mechanism.
  22. Picard, Gilles, Embedded RF environmental evaluation tool to gauge RF transceivers performance need.
  23. Lakich, Daniel M., Extending contact life in remote disconnect applications.
  24. Gronemeyer, Steven A., Fast acquisition of GPS signal.
  25. Gronemeyer, Steven A., Fast reacquisition of a GPS signal.
  26. White, Stanley A.; Walley, Kenneth S.; Johnston, James W.; Henderson, P. Michael; Hale, Kelly H.; Andrews, Jr., Warner B.; Siann, Jonathan I., Field unit for use in a GPS system.
  27. Garrison Stuber, Michael T.; McDonald, Brett D.; Guthrie, Kevin D.; Falendysz, Jr., Eugene L., Firmware download.
  28. Picard, Gilles, Firmware download with adaptive lost packet recovery.
  29. Haddab, Youcef; Kerlain, Alexandre; Mosser, Vincent; Van Wyk, Hartman, Hall sensor with temperature drift control.
  30. Haddab, Youcef; Kerlain, Alexandre; Mosser, Vincent; Van Wyk, Hartman, Hall sensor with temperature drift control.
  31. Stuber, Michael T. Garrison; Buffington, John, Home area networking (HAN) with handheld for diagnostics.
  32. Garrison Stuber, Michael T.; Buffington, John, Home area networking (HAN) with low power considerations for battery devices.
  33. Chris Levesque, Integrated power management module.
  34. Kudhrethaya A. Shridhara, Jamming detection and blanking for GPS receivers.
  35. Makinson, David N.; Lancaster, Andrew; Swanson, Scott, Load side voltage sensing for AMI metrology.
  36. Makinson, David N.; Lancaster, Andrew; Swanson, Scott, Load side voltage sensing for AMI metrology.
  37. Song Wei-jei, Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff.
  38. Osugi, Akihiro; Tada, Kazuto, Method and device for searching signal, GNSS signal reception apparatus and information equipment terminal.
  39. Wang, Xinyu; Gahler, Marcus R; Elgorriaga, Igor; Higgins, Robert P.; Norris, Paul R., Method and device of peak detection in preamble synchronization for direct sequence spread spectrum communication.
  40. Underbrink, Paul A.; Gronemeyer, Steven A., Method and system for data detection in a global positioning system satellite receiver.
  41. Underbrink, Paul A.; Gronemeyer, Steven A., Method and system for data detection in a global positioning system satellite receiver.
  42. Underbrink,Paul A.; Gronemeyer,Steven A., Method and system for data detection in a global positioning system satellite receiver.
  43. Iannuzzelli, Russell; Kroeger, Brian William; Chalmers, Harvey, Method for alignment of analog and digital audio in a hybrid radio waveform.
  44. Gerakoulis, Diakoumis Parissis, Method for packet-switching interface for code division switching in a terrestrial wireless system.
  45. Ajay Dholakia CH; Evangelos Stavros Eleftheriou CH; Robert F. H. Fischer DE; Fredy D. Neeser CH; Malcolm Scott Ware, Modems, methods, and computer program products for identifying a signaling alphabet in variance with an ideal alphabet due to digital impairments.
  46. Monier, Fabrice; Bartier, Jerome, Number of sons management in a cell network.
  47. Monier, Fabrice; Bartier, Jerome, Number of sons management in a cell network.
  48. Van Wyk, Hartman; Monier, Fabrice; Bartier, Jerome, Outage notification system.
  49. Holbrook, Kenneth J.; Higgins, Christopher M., Periodic balanced communication node and server assignment.
  50. Underbrink, Paul A., Personal communications device with ratio counter.
  51. Borisov, Vladimir; Pontin, Joseph, RF local area network antenna design.
  52. Borisov, Vladimir; Pontin, Joseph, RF local area network antenna design.
  53. Picard, Gilles, Real time clock distribution and recovery.
  54. Picard, Gilles, Real time clock distribution and recovery.
  55. Underbrink, Paul A., Signal detector employing a Doppler phase correction system.
  56. Underbrink, Paul A.; Gronemeyer, Steven A., Signal detector employing a doppler phase correction system.
  57. Gronemeyer, Steven A., Signal detector employing coherent integration.
  58. Steven A. Gronemeyer, Signal detector employing coherent integration.
  59. Gronemeyer Steven A., Signal detector employing correlation analysis of non-uniform and disjoint sample segments.
  60. Gronemeyer, Steven A., Signal detector employing correlation analysis of non-uniform and disjoint sample segments.
  61. Gronemeyer,Steven A., Signal detector employing correlation analysis of non-uniform and disjoint sample segments.
  62. Cumeralto,Scott; MacConnell,John, Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping.
  63. Kudhrethaya, Shridhara A.; Underbrink, Paul A., Spread spectrum receiver performance improvement.
  64. Chrisikos, George, System and method for automatic frequency control in spread spectrum communications.
  65. Underbrink, Paul A.; Gronemyer, Steven A., System and method for despreading in a spread spectrum matched filter.
  66. Underbrink, Paul A.; Gronemyer, Steven A., System and method for despreading in a spread spectrum matched filter.
  67. Picard, Gilles, Traffic load control in a mesh network.
  68. Picard, Gilles, Traffic load control in a mesh network.
  69. Johnson, Matthew, Traffic management and remote configuration in a gateway-based network.
  70. Van Wyk, Hartman; Picard, Gilles; Monier, Fabrice; Clave, Arnaud; Bartier, Jerome, Uplink routing without routing table.
  71. Van Wyk, Hartman; Picard, Gilles; Monier, Fabrice; Clave, Arnaud; Bartier, Jerome, Uplink routing without routing table.
  72. Picard, Gilles, Use of minimal propagation delay path to optimize a mesh network.
  73. Picard, Gilles, Use of minimal propagation delay path to optimize a mesh network.
  74. Picard, Gilles, Use of minimal propagation delay path to optimize a mesh network.
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