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Class Information
Number: 342/402
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > With transmisson of bearing or position determinative signals > Tacan > Receiver only > Vor > Doppler
Description: Subject matter wherein the variable signal has been developed by sequentially feeding a radio-frequency signal to a multiplicity of antennas and detecting the subsequent "Shift in the signal frequency" by the receiver.










Sub-classes under this class:

Class Number Class Name Patents
342/403 With circular array of antennas 6


Patents under this class:

Patent Number Title Of Patent Date Issued
7768963 System and method of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device Aug. 3, 2010
7492810 Method and apparatus for segmented code correlation Feb. 17, 2009
7489274 System and method for generating a very high frequency omnidirectional range signal Feb. 10, 2009
7302267 Apparatus and method for estimating a velocity of a mobile terminal in a mobile communication system Nov. 27, 2007
6151353 Pre-acquisition frequency offset removal in a GPS receiver Nov. 21, 2000
5878330 Satellite communications system including automatic frequency control Mar. 2, 1999
5757677 Compensation for differences in receiver signals and in satellite signals May. 26, 1998
5526291 Compensation for receiver and satellite signal differences Jun. 11, 1996
5465274 Digital circuit for decoding encoded doppler data Nov. 7, 1995
4485384 Microwave system Nov. 27, 1984
4417250 Monitoring device for a radio navigation system of the doppler VOR type Nov. 22, 1983
4148034 Radio direction finding system Apr. 3, 1979
4017862 Aircraft guidance system Apr. 12, 1977
3988733 VOR receiver with improved performance in a Doppler navigation system Oct. 26, 1976
3977002 Tracking filter for frequency measurement in a Doppler type navigation guidance system or the like Aug. 24, 1976
3958244 Transmitter output monitor May. 18, 1976
3946386 Navigation receiver with doppler filter gating Mar. 23, 1976
3943518 Doppler ILS receiver with beat signal scan synchronization Mar. 9, 1976











 
 
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