Radar receiver motion compensation system and method
First Claim
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1. A motion compensation unit for use in a radar system, wherein the motion compensation unit comprises:
- a) a match filter module producing filtered range-pulse-sensor data;
b) a motion information module providing motion information related to motion of the radar system;
c) a motion compensation beamformer module operably coupled to the match filter module and the motion information module, the motion compensation beamformer module utilizing the motion information to provide motion-compensated range-pulse-azimuth data; and
, d) a Doppler processing module operably coupled to the motion compensation beamformer module, the Doppler processing module providing motion-compensated range-Doppler-azimuth data.
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Abstract
A motion compensation unit and method for use in a radar system. The motion compensation unit comprises a match filter module for producing filtered range-pulse-sensor data; a motion information module for providing motion information related to motion of the radar system; a motion compensation beamformer module connected to the match filter module and the motion information module for utilizing the motion information to provide motion-compensated range-pulse-azimuth data; and, a Doppler processing module connected to the motion compensation beamformer module to provide motion-compensated range-Doppler-azimuth data.
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Citations
41 Claims
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1. A motion compensation unit for use in a radar system, wherein the motion compensation unit comprises:
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a) a match filter module producing filtered range-pulse-sensor data;
b) a motion information module providing motion information related to motion of the radar system;
c) a motion compensation beamformer module operably coupled to the match filter module and the motion information module, the motion compensation beamformer module utilizing the motion information to provide motion-compensated range-pulse-azimuth data; and
,d) a Doppler processing module operably coupled to the motion compensation beamformer module, the Doppler processing module providing motion-compensated range-Doppler-azimuth data. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of motion compensation for a radar system, wherein the method comprises:
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a) match filtering radar data for producing filtered range-pulse-sensor data;
b) obtaining motion information related to motion of the radar system;
c) motion-compensated beamforming the filtered range-pulse-sensor data according to the motion information to provide motion compensated range-pulse-azimuth data; and
,d) Doppler processing the motion compensated range-pulse-azimuth data to provide motion-compensated range-Doppler-azimuth data. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for determining motion compensation for a radar system, the radar system comprising an antenna having at least one antenna element with a phase center, the method comprising:
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obtaining, for a desired coherent integration time (CIT) of the radar system, rotation and translation information associated with movement of the radar system over the desired CIT;
determining, using at least a portion of rotation and translation information, a change in the location of the phase center of the antenna element over the CIT; and
computing, based on the change in location of the phase center, a phase correction for the antenna element. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A motion compensation unit for use in a radar system, the radar system comprising an antenna having at least one antenna element with a phase center, wherein the motion compensation unit comprises:
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a match filter module producing filtered range-pulse-sensor data;
a motion information module providing motion information related to the motion of the radar system, wherein the motion information further comprises phase correction information associated with movement of the phase center of the antenna element;
a motion compensation beamformer module operably coupled to the match filter module and to the motion information module, the motion compensation beamformer module using the motion information to provide motion-compensated range-pulse-azimuth data; and
a Doppler processing module operably coupled to the motion compensation beamformer module, the Doppler processing module providing motion-compensated range-Doppler-azimuth data.
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39. A high frequency radar system adapted for use on a vessel, the radar system comprising:
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an antenna comprising at least one element, the element having a phase center;
a high frequency receiver operably coupled to the antenna;
a match filter operably coupled to the receiver, the match filter producing filtered range-pulse-sensor data;
a motion information module providing motion information related to motion of the radar system, wherein the motion information comprises phase correction information associated with movement of the phase center of the antenna element;
a motion compensation beamformer operably coupled to the match filter and to the motion information module, the motion compensation beamformer using the motion information to provide motion-compensated range-pulse-azimuth data; and
a Doppler processor operably coupled to the motion compensation beamformer, the Doppler processor providing motion-compensated range-Doppler-azimuth data. - View Dependent Claims (40)
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41. A motion compensation system for use with a radar system, the radar system comprising an antenna having at least one antenna element with a phase center, wherein the motion compensation system comprises:
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means for providing filtered range-pulse-sensor data;
means for providing phase correction information associated with movement of the phase center of the antenna element;
means for providing motion-compensated range-pulse-azimuth data based on the filtered range-pulse-sensor data and the phase correction information; and
means for providing motion-compensated range-Doppler-azimuth data based on the motion-compensated range-pulse-azimuth data.
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Specification