MULTISTATIC TARGET DETECTION AND GEOLOCATION
First Claim
1. A multistatic radar system comprising:
- a transmitter for transmitting signals to reflect off a target;
a plurality of spatially separated receivers for receiving the reflected signals from the target; and
a signal processor for fusing the received reflected signals from the receivers,wherein the fusing of the received reflected signals comprises;
aligning the received reflected signals in time delay and Doppler shift; and
summing the resulting aligned signals to detect or geolocate the target.
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Accused Products
Abstract
Aspects of this invention are directed to the substantially improved detection and geolocation accuracy of targets (stationary or moving) by using the coherent data received at multiple airborne sensors. Further aspects are directed to aligning the (unknown) time-delayed and Doppler-shifted signals received at the multiple sensors relative to an arbitrary reference sensor, which depend on the unknown target position. This results in the target position and velocity vectors being simultaneously estimated and the detection peak enhanced by obtaining near coherent gain. Still further aspects are directed to the coherent generalized likelihood ratio test (GLRT) and the minimum variance distortionless response (MVDR) statistic for multistatic radar systems, conditioned on estimation of certain parameters that render the system coherent. Analytical and computer simulation results are presented to show substantially enhanced detection and geolocation of moving targets in clutter.
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Citations
20 Claims
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1. A multistatic radar system comprising:
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a transmitter for transmitting signals to reflect off a target; a plurality of spatially separated receivers for receiving the reflected signals from the target; and a signal processor for fusing the received reflected signals from the receivers, wherein the fusing of the received reflected signals comprises; aligning the received reflected signals in time delay and Doppler shift; and summing the resulting aligned signals to detect or geolocate the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of detection and geolocation of a target by a multistatic radar system comprising a transmitter, a plurality of spatially separated receivers, and a signal processor, the method comprising:
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transmitting signals from the transmitter to the target, producing reflected signals off the target; receiving the reflected signals in the receivers; and fusing the received reflected signals, comprising; aligning the received reflected signals in time delay and Doppler shift; and summing the resulting aligned signals to detect or geolocate the target. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification