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Class Information
Number: 342/99
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Return signal controls radar system > Receiver > Frequency > Doppler frequency tracking
Description: Subject matter wherein circuitry is provided to follow variations in the doppler component of the returned signal.

Sub-classes under this class:

Class Number Class Name Patents
342/101 With filter control 61
342/100 Wtih local osillator control 75

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
6246357 Radar apparatus Jun. 12, 2001
6239740 Efficient data association with multivariate Gaussian distributed states May. 29, 2001
6239738 Signal processing method in a motor vehicle radar system and radar system therefor May. 29, 2001
6201496 Target angle estimator for search radars Mar. 13, 2001
6188348 Radar ice sounder with parallel doppler processing Feb. 13, 2001
6166678 Fourier-transform-based adaptive radio interference mitigation Dec. 26, 2000
6137406 Double superheterodyne type microwave detector capable of detecting leaked microwaves Oct. 24, 2000
6137435 Onboard radar apparatus Oct. 24, 2000
6133865 CW converter circuit Oct. 17, 2000
6091356 Chirp source with rolling frequency lock for generating linear frequency chirps Jul. 18, 2000
6081224 High accuracy, low speed doppler effect radar and signal conditioning circuit useful in agricultural applications Jun. 27, 2000
6072423 Method for measuring the doppler shift in a sensor system using ambiguous codes Jun. 6, 2000
6072419 Method for the processing of the reception signal of a deramp type synthetic aperture radar Jun. 6, 2000
6064333 Phased array radar system for tracking May. 16, 2000
6049301 Surveillance apparatus and method for the detection of radio receivers Apr. 11, 2000
6049302 Pulsed doppler radar system with small intermediate frequency filters Apr. 11, 2000
6018309 Radar data processing method and radar apparatus using the same Jan. 25, 2000
5912640 Boost engine cutoff estimation in Doppler measurement system Jun. 15, 1999
5912620 Combined type intrusion and attack sensing means Jun. 15, 1999
5864313 Process for determining the intermediate frequency deviation in frequency pulsed radar systems Jan. 26, 1999
5808580 Radar/sonar system concept for extended range-doppler coverage Sep. 15, 1998
5796364 Method of determining the velocity of a radar target Aug. 18, 1998
5736957 Delay compensated doppler radar altimeter Apr. 7, 1998
5717399 Radar device for vehicle use Feb. 10, 1998
5644315 Doppler ratio detection radar with range CFAR Jul. 1, 1997
5610609 Passive doppler emitter classification and ranging system utilizing a time-frequency constant Mar. 11, 1997
5586148 Coherent detection system Dec. 17, 1996
5581237 Microwave intrusion detector with threshold adjustment in response to periodic signals Dec. 3, 1996
5534866 Emitter frequency-time measurement by a moving observer using no navigation input Jul. 9, 1996
5473332 RFI suppression circuit and method Dec. 5, 1995
5471648 Device for correcting frequency shift due to the doppler effect in a transmission system Nov. 28, 1995
5467091 Radar and other communication systems having large bandwidth and large dynamic range Nov. 14, 1995
5457462 Radar signal processor and pulse doppler radar system therewith Oct. 10, 1995
5381156 Multiple target doppler tracker Jan. 10, 1995
5376940 Helicopter recognition radar processor Dec. 27, 1994
5198748 Frequency measurement receiver with bandwidth improvement through synchronized phase shifted sampling Mar. 30, 1993
5191347 Pulsed Doppler radar system Mar. 2, 1993
5173706 Radar processor with range sidelobe reduction following doppler filtering Dec. 22, 1992
5168215 Instantaneous frequency measurement apparatus and method Dec. 1, 1992
5132688 Pulsed doppler radar system having an improved detection probability Jul. 21, 1992
5055849 Method and device for measuring velocity of target by utilizing doppler shift of electromagnetic radiation Oct. 8, 1991
5034748 Narrow band automatic phase control tracking circuitry Jul. 23, 1991
5019824 Multistage estimation of received carrier signal parameters under very high dynamic conditions of the receiver May. 28, 1991
RE33055 Doppler tracking processor and time of closest approach detector Sep. 12, 1989
4861159 Dynamic Doppler optical gauge Aug. 29, 1989
4861158 Chirp and Doppler optical gauge Aug. 29, 1989
4827263 Pulse doppler radar system May. 2, 1989
4672381 Doppler tracking processor and time of closest approach detector Jun. 9, 1987
4647874 Doppler signal processing circuitry Mar. 3, 1987
4633252 Radar velocity sensor Dec. 30, 1986

1 2 3

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