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Class Information
Number: 367/904
Name: Communications, electrical: acoustic wave systems and devices > Doppler compensation systems
Description: Acoustic wave systems wherein correction is provided for errors which would otherwise occur because of an apparant frequency shift in an acoustic wave due to relative movement between source and receiver.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8682244 Underwater communication system Mar. 25, 2014
8515343 Water based vehicle communications system Aug. 20, 2013
8515344 Diver communication system Aug. 20, 2013
8385821 Underwater vehicle communications system Feb. 26, 2013
8364078 Communications system Jan. 29, 2013
8346164 Underwater communication system Jan. 1, 2013
8326219 Communications system Dec. 4, 2012
8315560 Underwater navigation Nov. 20, 2012
8131213 Sea vessel tagging apparatus and system Mar. 6, 2012
8055193 Underwater remote sensing Nov. 8, 2011
8005424 Communication device and communication method of underwater vehicle Aug. 23, 2011
7877059 Underwater communications system comprising relay transceiver Jan. 25, 2011
7873316 Underwater communications system Jan. 18, 2011
7865139 Method and system for relaying signals from a magneto-inductive system through a voice-band system Jan. 4, 2011
7853206 Underwater communications system with adaptable carrier frequency Dec. 14, 2010
7711322 Underwater communications system and method May. 4, 2010
7209529 Doppler compensated receiver Apr. 24, 2007
7027357 Acoustic communication device and acoustic signal communication method Apr. 11, 2006
6965753 Apparatus for performing doppler correction in a wireless communications system Nov. 15, 2005
6778467 Underwater sounding apparatus Aug. 17, 2004
6687188 Underwater telemetry apparatus and method Feb. 3, 2004
6512720 Underwater telemetry method using doppler compensation Jan. 28, 2003
6130859 Method and apparatus for carrying out high data rate and voice underwater communication Oct. 10, 2000
6072425 Terrain bias compensator for doppler navigation systems Jun. 6, 2000
5923281 Terrain bias compensator for doppler navigation systems Jul. 13, 1999
5805526 Echo detection doppler gate Sep. 8, 1998
5754497 Method for locating structure-borne sound events in pressure enclosures to be monitored in power plants May. 19, 1998
5732044 System and method for compensating for doppler shifts in signals by downsampling Mar. 24, 1998
5519402 Doppler shift compensation apparatus May. 21, 1996
5428581 Method for compensating for the movement of the antenna for a sonar Jun. 27, 1995
5337053 Method and apparatus for classifying targets Aug. 9, 1994
5184241 Doppler shift compensation system for laser transmitters and receivers Feb. 2, 1993
5130952 Broadband adaptive doppler estimator and canceller Jul. 14, 1992
5091890 Method of extracting target range and Doppler information from a Doppler-spread signal Feb. 25, 1992
5077702 Doppler consistent hyperbolic frequency modulation Dec. 31, 1991
4980868 Sonar system Dec. 25, 1990
4905211 Precision doppler effect compensator Feb. 27, 1990
4809235 Method for removing doppler phase dispersion from seismic data Feb. 28, 1989
4712200 Device for processing modulated signals received by a lateral sonar system Dec. 8, 1987
4586172 Adaptable filtering device and method for filtering sonar signals to remove reverberation signals due to vehicle speed and trim and the sea surface and sea bottom Apr. 29, 1986
4428073 Underwater depth telemetry Jan. 24, 1984
4349915 Minimization of multipath and doppler effects in radiant energy communication systems Sep. 14, 1982
4316269 Own doppler nullifier for sonar system Feb. 16, 1982
4274148 Digital time-delay beamformer for sonar systems Jun. 16, 1981
4208734 Underwater communication system Jun. 17, 1980
4207625 Doppler compensator for heterodyne correlation devices Jun. 10, 1980
4206510 Automatic detection and classification device Jun. 3, 1980
4204280 Underwater signal discrimination system May. 20, 1980
4203164 Secure sonar communication system May. 13, 1980
4200872 Doppler compensated digital non-linear waveform generator apparatus Apr. 29, 1980

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