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Class Information
Number: 342/101
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Return signal controls radar system > Receiver > Frequency > Doppler frequency tracking > With filter control
Description: Subject matter wherein the returned signal is used to vary the center frequency or the bandwidth of a receiver filter circuit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7535403 |
Method of determining the velocity field of an air mass by high resolution doppler analysis |
May. 19, 2009 |
| 7474262 |
Digital beamforming for an electronically scanned radar system |
Jan. 6, 2009 |
| 7411543 |
Maximum-likelihood rocket identifier |
Aug. 12, 2008 |
| 7336218 |
Radar system with peak frequency analysis and window functions |
Feb. 26, 2008 |
| 7327308 |
Programmable method and test device for generating target for FMCW radar |
Feb. 5, 2008 |
| 7053815 |
Radar tracking system |
May. 30, 2006 |
| 7026980 |
Missile identification and tracking system and method |
Apr. 11, 2006 |
| 6975264 |
Signal separating system |
Dec. 13, 2005 |
| 6967613 |
Broadband waveform reconstruction for radar |
Nov. 22, 2005 |
| 6536893 |
Waterfast and smearfast inks using ink jet delivered dye sublimation dyes |
Mar. 25, 2003 |
| 6411250 |
Electromagnetic sensor system |
Jun. 25, 2002 |
| 6389084 |
Apparatus and method for equalizing a signal independent of the impact of doppler frequency |
May. 14, 2002 |
| 6297764 |
Radar receiver having matched filter processing |
Oct. 2, 2001 |
| 6211815 |
Coherent radar detection using non-coherent architecture |
Apr. 3, 2001 |
| 6204802 |
Apparatus for detecting relative velocity |
Mar. 20, 2001 |
| 6052421 |
Method for separating a desired signal from an interfering signal |
Apr. 18, 2000 |
| 6049302 |
Pulsed doppler radar system with small intermediate frequency filters |
Apr. 11, 2000 |
| 6040796 |
Radar system installable in an automotive vehicle for detecting a target object |
Mar. 21, 2000 |
| 6018311 |
Noncoherent gain enhancement technique for improved detection-estimation performance |
Jan. 25, 2000 |
| 5926125 |
Synthetic aperture radar |
Jul. 20, 1999 |
| 5864313 |
Process for determining the intermediate frequency deviation in frequency pulsed radar systems |
Jan. 26, 1999 |
| 5852418 |
Notched-spectrum swept-frequency generator and method therefor |
Dec. 22, 1998 |
| 5796364 |
Method of determining the velocity of a radar target |
Aug. 18, 1998 |
| 5790068 |
AFC control switching circuit |
Aug. 4, 1998 |
| 5661487 |
Digital center line filter |
Aug. 26, 1997 |
| 5657026 |
Beacon signal receiving system |
Aug. 12, 1997 |
| 5644315 |
Doppler ratio detection radar with range CFAR |
Jul. 1, 1997 |
| 5481270 |
Radar with adaptive range sidelobe suppression |
Jan. 2, 1996 |
| 5473332 |
RFI suppression circuit and method |
Dec. 5, 1995 |
| 5467091 |
Radar and other communication systems having large bandwidth and large dynamic range |
Nov. 14, 1995 |
| 5376940 |
Helicopter recognition radar processor |
Dec. 27, 1994 |
| 5345470 |
Methods of minimizing the interference between many multiple FMCW radars |
Sep. 6, 1994 |
| 5325098 |
Interacting multiple bias model filter system for tracking maneuvering targets |
Jun. 28, 1994 |
| 5313212 |
Track filter bias estimation |
May. 17, 1994 |
| 5214433 |
Two-stage target tracking system and method |
May. 25, 1993 |
| 5191337 |
Ranging, detection and resolving in a multislope frequency modulated waveform radar system |
Mar. 2, 1993 |
| 5189426 |
Doppler frequency spectrum de-emphasis for automotive collision avoidance radar system |
Feb. 23, 1993 |
| 5181038 |
Target persistence filter for multi-frequency automotive radar system |
Jan. 19, 1993 |
| 5177487 |
Sea velocity evaluator |
Jan. 5, 1993 |
| 5173706 |
Radar processor with range sidelobe reduction following doppler filtering |
Dec. 22, 1992 |
| 5047778 |
FMCW radar range tracker and method |
Sep. 10, 1991 |
| 5012253 |
Radar receiver |
Apr. 30, 1991 |
| 4937583 |
Radar receiving device and radar including such a device |
Jun. 26, 1990 |
| 4903030 |
Angular discrimination process and device for radar |
Feb. 20, 1990 |
| 4783660 |
Signal source distortion compensator |
Nov. 8, 1988 |
| 4724437 |
Signal acquisition circuit with variable bandwidth phase locked loop |
Feb. 9, 1988 |
| 4709236 |
Selectable doppler filter for radar systems |
Nov. 24, 1987 |
| 4435709 |
Radar ranging system for use with sloping target |
Mar. 6, 1984 |
| 4370652 |
Control systems for radar receivers |
Jan. 25, 1983 |
| 4290066 |
High speed adaptive clutter filter |
Sep. 15, 1981 |
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