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Class Information
Number: 342/405
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 > 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
342/406 With circular array of antennas 11


Patents under this class:

Patent Number Title Of Patent Date Issued
8050691 Method and arrangements in a mobile telecommunication network Nov. 1, 2011
8050719 Radio communication system, mobile terminal unit thereof, and azimuth determining method Nov. 1, 2011
8031118 Phase correction apparatus, DVOR apparatus, and phase correction method Oct. 4, 2011
7952520 DVOR monitor device, and DVOR monitor method May. 31, 2011
7786924 DVOR apparatus and sideband antenna fault detecting method Aug. 31, 2010
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
7630738 Radio communication system, mobile terminal unit thereof, and azimuth determining method Dec. 8, 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
6996420 Radio communication system, mobile terminal unit thereof, and azimuth determining method Feb. 7, 2006
5878330 Satellite communications system including automatic frequency control Mar. 2, 1999
5635941 Method and apparatus for feeding over-modulated message signals to antennas of an antenna array Jun. 3, 1997
4920348 Method and apparatus for signal modulation and detection Apr. 24, 1990
4644358 Stem orientation measurement apparatus Feb. 17, 1987
4485384 Microwave system Nov. 27, 1984
4417250 Monitoring device for a radio navigation system of the doppler VOR type Nov. 22, 1983
4160960 Power-dividing and modulating arrangement Jul. 10, 1979
4151529 Radio beacon for aerial navigation system Apr. 24, 1979
4106023 Navigation aid system Aug. 8, 1978
4104636 Doppler reference antenna with phased centerline emphasis Aug. 1, 1978
4063242 Doppler navigation system with reference signal source diversity Dec. 13, 1977
4035804 Simulated Doppler navigational system with second order diversity Jul. 12, 1977
4017860 Radio navigation beacon Apr. 12, 1977
3953854 Doppler radio navigation beacon system with means for reducing multipath signal effects Apr. 27, 1976











 
 
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