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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5415045 |
Apparatus and method for detecting flaws in and inspecting an object |
May. 16, 1995 |
| 5379268 |
Multi-dimensional signal processing and display |
Jan. 3, 1995 |
| 5349859 |
Method and apparatus for measuring acoustic wave velocity using impulse response |
Sep. 27, 1994 |
| 5349567 |
Least mean square (LMS) normalizer for active sonar |
Sep. 20, 1994 |
| 5260910 |
High resolution acoustic pulse-echo ranging system |
Nov. 9, 1993 |
| 5251185 |
Sonar signal processor and display |
Oct. 5, 1993 |
| 5251186 |
Preprocessor and adaptive beamformer for linear-frequency modulation active signals |
Oct. 5, 1993 |
| 5245587 |
Multi-dimensional signal processing and display |
Sep. 14, 1993 |
| 5212489 |
Echo ranging system for detecting velocity of targets using composite doppler invariant transmissions |
May. 18, 1993 |
| 5212490 |
Echo ranging system for detecting velocity and range of targets using composite doppler invariant-like transmissions with suppression of false targets |
May. 18, 1993 |
| 5203823 |
Detecting apparatus |
Apr. 20, 1993 |
| 5122990 |
Bottom tracking system |
Jun. 16, 1992 |
| 5107271 |
Target track assessment |
Apr. 21, 1992 |
| 5077702 |
Doppler consistent hyperbolic frequency modulation |
Dec. 31, 1991 |
| 5065629 |
Ultrasonic insection apparatus |
Nov. 19, 1991 |
| 5054004 |
Method of active sonar detection of a stationary target |
Oct. 1, 1991 |
| 5038615 |
Ultrasonic multilayer paint thickness measurement |
Aug. 13, 1991 |
| 4998224 |
System for providing improved reverberation limited sonar performance |
Mar. 5, 1991 |
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