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Class Information
Number: 342/453
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Position indicating (e.g., triangulation) > By deflected or repeated signal
Description: Subject matter wherein the receiver signals have been deflected by an object or a surface or have been retransmitted by a repeater station.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8682351 Method and apparatus for locating a WLAN station based on a propagation delay of a signal Mar. 25, 2014
8619908 Wireless ranging system and related methods Dec. 31, 2013
8588789 Mobile communication system with device handover and method of operation thereof Nov. 19, 2013
8547279 Incoming wave classifying and distinguishing device, incoming wave classifying and distinguishing method, originating position estimating device and originating position estimating method Oct. 1, 2013
8483720 Smart/active RFID tag for use in a WPAN Jul. 9, 2013
8478294 Method and system for mobile station location Jul. 2, 2013
8432253 Zone determination by combining signal strength with topological factors Apr. 30, 2013
8380362 Systems and methods for remotely collaborative vehicles Feb. 19, 2013
8373591 System for sensing aircraft and other objects Feb. 12, 2013
8359052 Transmit power adaptation algorithm using 802.11H Jan. 22, 2013
8355739 Method and apparatus for locating a WLAN station based on a propagation delay of a signal Jan. 15, 2013
8335637 Navigation device and method providing a traffic message channel resource Dec. 18, 2012
8299936 Method and apparatus for establishing low frequency/ultra low frequency and very low frequency communications Oct. 30, 2012
8279119 Systems and methods for transparency mapping using multipath signals Oct. 2, 2012
8155668 Radio communication apparatus, position measurement method for radio communication apparatus, and radio communication system Apr. 10, 2012
8077659 Method and apparatus for locating mobile multimedia multicast system capable wireless devices Dec. 13, 2011
8068850 Method of locating a transmitter Nov. 29, 2011
8018383 Method and apparatus for determining location using signals-of-opportunity Sep. 13, 2011
8004464 Multiple object localisation with a network of receivers Aug. 23, 2011
7996020 Locating a WLAN station using signal propagation delay Aug. 9, 2011
7973716 Systems and methods for transparency mapping using multipath signals Jul. 5, 2011
7911372 Active imaging using satellite communication system Mar. 22, 2011
7877101 Locating a WLAN station using signal propagation delay Jan. 25, 2011
7877197 Systems and methods for real-time conflict-checked, operationally preferred flight trajectory revision recommendations Jan. 25, 2011
7859463 Method of detection in bistatic mode using non-cooperative passive radio transmissions Dec. 28, 2010
7859464 Robust low-frequency spread-spectrum navigation system Dec. 28, 2010
7853269 System and method for providing wireless network services using three-dimensional access zones Dec. 14, 2010
7782256 Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects Aug. 24, 2010
7778794 System and method for identifying an element of a structure in an engineered environment Aug. 17, 2010
7764230 Methods for locating transmitters using backward ray tracing Jul. 27, 2010
7764231 Wireless location using multiple mobile station location techniques Jul. 27, 2010
7696899 Marker navigation device Apr. 13, 2010
7679561 Systems and methods for positioning using multipath signals Mar. 16, 2010
7663547 Determining a geolocation solution of an emitter on earth based on weighted least-squares estimation Feb. 16, 2010
7626969 Relative location of a wireless node in a wireless network Dec. 1, 2009
7613258 Apparatus and method for determining GPS tracking loop parameter based on SNR estimation Nov. 3, 2009
7593736 Positioning system for digital telephone networks Sep. 22, 2009
7548517 Method and apparatus for determining the location of a node in a wireless system Jun. 16, 2009
7492314 User equipment navigation solution with position determination of a navigation signal reflector Feb. 17, 2009
7468689 System and method for determining position of radar apparatus based on reflected signals Dec. 23, 2008
7456788 Method and apparatus for reducing geolocation ambiguity in signal tracking Nov. 25, 2008
7427952 Augmentation of commercial wireless location system (WLS) with moving and/or airborne sensors for enhanced location accuracy and use of real-time overhead imagery for identification of wireles Sep. 23, 2008
7411550 System for transmitting positioning signal Aug. 12, 2008
7406320 Method and system for location estimation in wireless networks Jul. 29, 2008
7307575 Through-the-wall frequency stepped imaging system utilizing near field multiple antenna positions, clutter rejection and corrections for frequency dependent wall effects Dec. 11, 2007
7271764 Time of arrival estimation mechanism Sep. 18, 2007
7269387 Method and apparatus for determining a distance between a base station and a mobile unit Sep. 11, 2007
7212159 Positioning system, apparatus and method May. 1, 2007
7212160 Locating an object of interest using back tracked-rays derived from multipath signals May. 1, 2007
7154392 Wide-area intruder detection and tracking network Dec. 26, 2006

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