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Browse by Category: Main > Communications
Class Information
Number: 367/100
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Distance or direction finding > With correlation or matched filtering
Description: Subject matter in which the degree of similarity between the transmitted and received signals is measured by multiplying the signals together and integrating the result, or in which a waveform of known shape is separated from random perturbing noise by optimal filtering.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8620082 Sonar image texture segmentation Dec. 31, 2013
8593908 Method for determining an echo distance in an acoustic pulse-echo ranging system Nov. 26, 2013
8547397 Processing of an image representative of an observation zone Oct. 1, 2013
8437222 System and method of range estimation May. 7, 2013
8385676 Context-cluster-level control of filtering iterations in an iterative discrete universal denoiser Feb. 26, 2013
8195425 Systems and methods for estimating distances using multi-resolution functions Jun. 5, 2012
8154438 Registration of latitude/longitude coordinates using range detection sensors and digital nautical charts Apr. 10, 2012
8127138 Method for embedding information in sonar Feb. 28, 2012
7929375 Method and apparatus for improved active sonar using singular value decomposition filtering Apr. 19, 2011
7924653 System and method of range estimation Apr. 12, 2011
7876645 System and method for detecting obstacles for vehicles Jan. 25, 2011
7855674 Method and radar system for coherent detection of moving objects Dec. 21, 2010
7852709 Sonar system and process Dec. 14, 2010
7663975 Underwater detection apparatus Feb. 16, 2010
7664165 Correlation apparatus based on symmetry of correlation coefficient and method thereof Feb. 16, 2010
7643376 Direction detecting device and direction detecting system Jan. 5, 2010
7535796 System and method for position determination of objects May. 19, 2009
7423933 Method for visualization of echoes received by an active sonar using a line spectrum emission Sep. 9, 2008
7355925 Signal-processing method and active sonar implementing same Apr. 8, 2008
7289388 Estimation of background noise and its effect on sonar range estimation Oct. 30, 2007
7149148 Localization of high speed vehicles using continuous transmit waves Dec. 12, 2006
7139220 Dynamic filter tuning for pulse-echo ranging systems Nov. 21, 2006
7034744 Method for processing output or base signals from a device for determining a distance of an object Apr. 25, 2006
6935177 Method for an entropy filter echo processing in time-of-flight or level measurement systems Aug. 30, 2005
6839303 Matched filter, receiving beam-forming apparatus and sonar system Jan. 4, 2005
6771561 Sonar system especially for shallow water application such as in littoral environments Aug. 3, 2004
6738313 System for detecting distances using chaotic signals May. 18, 2004
6714481 System and method for active sonar signal detection and classification Mar. 30, 2004
6636816 Vector signal analysis method and apparatus therefor Oct. 21, 2003
6552336 Non-invasive, opto-acoustic water current measurement system and method Apr. 22, 2003
6448923 Efficient estimation of spectral moments and the polarimetric variables on weather radars, sonars, sodars, acoustic flow meters, lidars, and similar active remote sensing instruments Sep. 10, 2002
6434085 Distance measuring systems altimeters and aircraft Aug. 13, 2002
6404702 Surveillance device for signal-echo sensors Jun. 11, 2002
6392959 Contact data correlation with reassessment May. 21, 2002
5949739 Sonar bearing estimation of extended targets Sep. 7, 1999
5910929 Audio railway crossing detector Jun. 8, 1999
5889490 Method and apparatus for improved ranging Mar. 30, 1999
5808580 Radar/sonar system concept for extended range-doppler coverage Sep. 15, 1998
5790475 Process and apparatus for improved interference suppression in echo-location and imaging systems Aug. 4, 1998
5764466 Circuit for short circuit detection through resistive shunt in power circuits using unipolar control voltage Jun. 9, 1998
5751658 Signal processor for narrow band sonar signals May. 12, 1998
5745437 Method and apparatus for coherent burst ranging Apr. 28, 1998
5570099 TDOA/FDOA technique for locating a transmitter Oct. 29, 1996
5555532 Method and apparatus for target imaging with sidelooking sonar Sep. 10, 1996
5515339 Ultrasonic transmitting-receiving apparatus May. 7, 1996
5515055 System for processing returns from a target from transmissions containing repeated signals to detect the doppler velocity of the target May. 7, 1996
5481503 Apparatus for and method of adaptively processing sonar data Jan. 2, 1996
5455806 Multi-dimensional signal processing and display Oct. 3, 1995
5420826 Optical correlator and method of using same May. 30, 1995
5417114 Echo based detecting apparatus employing signal generator and correlator May. 23, 1995

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