Motion compensated synthetic aperture imaging system and methods for imaging
First Claim
1. A synthetic aperture radar imaging unit comprising:
- forward and aft positioning antennas to receive at least three positioning signals that are transmitted from different locations;
an imaging antenna to receive radar return signals; and
a signal processor to compensate the return signals for position and orientation of the imaging antenna using the positioning signals.
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Accused Products
Abstract
A see-through-the-wall (STTW) imaging system uses a plurality of geographically separated positioning transmitters to transmit non-interfering positioning signals. An imaging unit generates a synthetic aperture image of a target by compensating for complex movement of the imaging unit using the positioning signals. The imaging unit includes forward and aft positioning antennas to receive at least three of the positioning signals, an imaging antenna to receive radar return signals from the target, and a signal processor to compensate the return signals for position and orientation of the imaging antenna using the positioning signals. The signal processor may construct the synthetic aperture image of a target from the compensated return signals as the imaging unit is moved with respect to the target. The signal processor may determine the position and the orientation of the imaging unit by measuring a relative phase of the positioning signals.
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Citations
33 Claims
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1. A synthetic aperture radar imaging unit comprising:
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forward and aft positioning antennas to receive at least three positioning signals that are transmitted from different locations; an imaging antenna to receive radar return signals; and a signal processor to compensate the return signals for position and orientation of the imaging antenna using the positioning signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A see-through-the-wall (STTW) synthetic aperture radar imaging system comprising:
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a plurality of geographically separated positioning transmitters to transmit non-interfering positioning signals; and a synthetic aperture radar imaging unit to generate a synthetic aperture radar image of a target based on receipt of radar return signals, wherein the imaging unit is to compensate the radar return signals for movement of the imaging unit using the positioning signals. - View Dependent Claims (19, 20, 21)
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22. A method of synthetic aperture radar imaging a target comprising:
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receiving at least three positioning signals that are separately transmitted from different locations, the positioning signals being received through forward and aft positioning antennas; receiving radar return signals through an imaging antenna; and compensating the return signals for position and orientation of the imaging antenna using the positioning signals. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification