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Class Information
Number: 342/444
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > Having plural receivers
Description: Subject matter wherein each received signal is connected to a separate receiver.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8570150 Sensing system and method with integral sensor locating capability Oct. 29, 2013
8532581 Wireless communication apparatus and method for selecting quality-reporting sub-carrier bands based on sub-carrier band quantity information from base station Sep. 10, 2013
8405550 Near-vertical direction finding and geolocation system Mar. 26, 2013
8373596 Detecting and locating RF emissions using subspace techniques to mitigate interference Feb. 12, 2013
8050719 Radio communication system, mobile terminal unit thereof, and azimuth determining method Nov. 1, 2011
8031119 Determining the angle of arrival of a target signal received by an array of antenna elements Oct. 4, 2011
7961147 Long baseline phase interferometer ambiguity resolution using frequency differences Jun. 14, 2011
7912680 Direction-of-arrival estimation apparatus Mar. 22, 2011
7630738 Radio communication system, mobile terminal unit thereof, and azimuth determining method Dec. 8, 2009
7557747 Method and apparatus using fast electronic switching for multi-channelizing a single-channel radar system Jul. 7, 2009
7532154 Frequency modulation radar device May. 12, 2009
H2224 Self-calibrating large baseline interferometer formed from two aircraft Oct. 7, 2008
7427954 Method and apparatus for direction finding Sep. 23, 2008
7395084 Dynamic antenna allocation system Jul. 1, 2008
7292831 Radio communicate method and system Nov. 6, 2007
7277046 Single transmit multi-receiver modulation radar, multi-modulation receiver and method Oct. 2, 2007
7213442 Methods of arranging transducers and transducer arrays having reduced phase ambiguity for determining direction of arrival of received signals May. 8, 2007
7130243 Location finding system, using reflected radio frequency or acoustic signals in a crowded reflector environment Oct. 31, 2006
6996420 Radio communication system, mobile terminal unit thereof, and azimuth determining method Feb. 7, 2006
6989789 Method for locating radioelectric sources using two-channel high resolution radiogoniometer Jan. 24, 2006
H2109 Passive microwave direction finding with monobit fourier transformation receiver and matrix coupled antenna Sep. 7, 2004
6735524 Spatially resolved and spatially aware antenna for radio navigation May. 11, 2004
6731955 Radio communication system, mobile terminal unit thereof, and azimuth determining method May. 4, 2004
6727840 Interference suppression circuit and method thereof for multi-channel receivers Apr. 27, 2004
6700536 System and method for determining a direction of incident electromagnetic signals Mar. 2, 2004
6690321 Multi-sensor target counting and localization system Feb. 10, 2004
6677893 Method and apparatus for locating the source of unknown signal Jan. 13, 2004
6670920 System and method for single platform, synthetic aperture geo-location of emitters Dec. 30, 2003
6639553 Passive/ranging/tracking processing method for collision avoidance guidance Oct. 28, 2003
6618009 Method and apparatus for locating the source of an unknown signal Sep. 9, 2003
6388604 Circuit for LPI signal detection and suppression of conventional pulsed signals May. 14, 2002
6366240 Location of aircraft with time difference of arrival Apr. 2, 2002
6313794 Method of detection and determining an angular location of frequency agile emitters Nov. 6, 2001
6313781 Simultaneous intrapulse analysis, direction finding and LPI signal detection Nov. 6, 2001
6278406 Direction finder and device for processing measurement results for the same Aug. 21, 2001
6255991 Low cost angle of arrival measurement system Jul. 3, 2001
6239747 Antenna system and method for direction finding May. 29, 2001
6223123 Method and apparatus for direction finding Apr. 24, 2001
6184829 Calibration for wireless location system Feb. 6, 2001
6169519 TCAS bearing measurement receiver apparatus with phase error compensation method Jan. 2, 2001
6025814 Antenna unit for the doppler measurement of grain flow Feb. 15, 2000
6018312 Locating the source of an unknown signal Jan. 25, 2000
5990833 System for direction determination Nov. 23, 1999
5969676 Radio frequency interferometer and laser rangefinder/destination base targeting system Oct. 19, 1999
5877722 Search method for detection and tracking of targets using multiple angle-only sensors Mar. 2, 1999
5835060 Self-resolving LBI triangulation Nov. 10, 1998
5805200 System for determining position from pseudorandomly modulated radio signals Sep. 8, 1998
5745071 Method and apparatus for precisely locating a resonant object Apr. 28, 1998
5570099 TDOA/FDOA technique for locating a transmitter Oct. 29, 1996
5493308 Close range fault tolerant noncontacting position sensor Feb. 20, 1996

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