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Class Information
Number: 342/432
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > With plural fixed antenna pattern comparing
Description: Subject matter wherein the receiving station provides for comparison of the energy received by a plurality of fixed directional antennas or by two antennas having dissimilar or received directional characteristics.

Sub-classes under this class:

Class Number Class Name Patents
342/440 Including a goniometer 12
342/439 Including combined effect indicator 11
342/437 Including more than two antennas 33
342/438 Including separate indicators 7
342/433 Successively commutated 34

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8681048 Arrival angle estimation system, communication device, and communication system Mar. 25, 2014
8519889 Method and apparatus for estimating location of a wireless station using multi-beam transmission Aug. 27, 2013
8494567 Method for selecting an effective angle of reception of a directional antenna of a receiver node, corresponding storage means and receiver node Jul. 23, 2013
8477068 Systems and methods for alignment with a remote source Jul. 2, 2013
8442557 Methods and apparatuses for providing expected signal data to a mobile station May. 14, 2013
8405549 Direction finding method and device Mar. 26, 2013
8334808 Direction finding antenna system and method Dec. 18, 2012
8305265 Radio-based direction-finding navigation system using small antenna Nov. 6, 2012
8248303 Radio control method Aug. 21, 2012
8242957 Method and system for dynamic tracking utilizing leaky wave antennas Aug. 14, 2012
8229017 Transmit beamforming utilizing channel estimation matrix decomposition feedback in a wireless MIMO communication system Jul. 24, 2012
8223073 Apparatus and method for a directional finder Jul. 17, 2012
8068555 Methods and systems for combined cyclic delay diversity and precoding of radio signals Nov. 29, 2011
8059031 Beam switching antenna system and method and apparatus for controlling the same Nov. 15, 2011
8054225 Method and device for wireless directional beam-forming transmission Nov. 8, 2011
8035562 Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver Oct. 11, 2011
7924225 Direction finding antenna systems and methods for use thereof Apr. 12, 2011
7843388 Arrival direction estimation apparatus Nov. 30, 2010
7755534 Radar sensor for receiving radar wave while judging existence of wave attenuator Jul. 13, 2010
7724191 Apparatus and method for tracing position and direction of target object through RF signal May. 25, 2010
7683757 Multi-antenna system and method for remotely controlling a function Mar. 23, 2010
7633442 Satellite communication subscriber device with a smart antenna and associated method Dec. 15, 2009
7612715 Direction finding Nov. 3, 2009
7580674 Intelligent interface for controlling an adaptive antenna array Aug. 25, 2009
7574179 Mobile broadband wireless network with interference mitigation mechanism to minimize interference within a cluster during multiple concurrent transmissions Aug. 11, 2009
7414582 Method and apparatus for all-polarization direction finding Aug. 19, 2008
7391370 Method and apparatus for adaptive direction estimation of radio waves Jun. 24, 2008
7388499 Electronic tag authentication device and communication adjustment method with electronic tag Jun. 17, 2008
7382840 RF signal processing in multi-antenna systems Jun. 3, 2008
7348924 Method of positioning the antennas of a data transmission system Mar. 25, 2008
7321332 Device for measuring angle positions Jan. 22, 2008
7295825 Diversity antenna arrangement Nov. 13, 2007
7280073 Method and system for determining direction of transmission using multi-facet antenna Oct. 9, 2007
7277053 Apparatus and methods for detecting and locating signals Oct. 2, 2007
7221268 Method and system for providing an active routing antenna May. 22, 2007
7068221 Technique for direction-of-arrival estimation without eigendecomposition and its application to beamforming at base station Jun. 27, 2006
7042394 Method and system for determining direction of transmission using multi-facet antenna May. 9, 2006
6992624 Attitude determination system using null-steered array Jan. 31, 2006
6794767 Actuator for release devices of vehicles, preferably motor vehicles Sep. 21, 2004
6618009 Method and apparatus for locating the source of an unknown signal Sep. 9, 2003
6583761 Method and device for determining a position Jun. 24, 2003
6559935 Sensors of relative position and orientation May. 6, 2003
6292136 Multi target tracking initiation with passive angle measurements Sep. 18, 2001
6278406 Direction finder and device for processing measurement results for the same Aug. 21, 2001
6222486 Method for the precise angle determination of targets by means of a multiple-unit radar system Apr. 24, 2001
6223123 Method and apparatus for direction finding Apr. 24, 2001
6121925 Data-link and antenna selection assembly Sep. 19, 2000
5796366 Method of and apparatus for position location and tracking of a vehicle or the like by the reception at the vehicle of pulsed radio navigation signals as of the Loran-OC type and the like, wit Aug. 18, 1998
5740530 Rapid received signal strength indication Apr. 14, 1998
5617102 Communications transceiver using an adaptive directional antenna Apr. 1, 1997

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