System and method for detection and discrimination of targets in the presence of interference
First Claim
1. A method for detecting one or more targets comprising:
- receiving signals including reflections from the one or more targets and interference;
computing one or more projections of cross-ambiguity functions of processed or unprocessed received signals and a reference signal;
processing the one or more computed projections to reduce interference contribution(s), wherein the processing comprises performing a mathematical operation on a value of the one or more computed projections, said value having angle-Doppler component coordinates;
determining an angle and a Doppler component for at least one target based on the processed computed projections; and
for the determined angle and Doppler component, determining a corresponding range component for the at least one target.
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Accused Products
Abstract
Systems and method of detection and discrimination of targets in the presence of interference are disclosed. A system transmits a signal and then receives signals including interference and reflections of transmitted signals. The system processes the received signals and transmitted signals to generate a 2D representation of the STAP cube with one of the dimensions collapsed. The system then reduces the interference contributions and identifies angle and Doppler component of potential targets. The system then computes slices, which are one dimensional representation of cross-ambiguity functions of the received and transmitted signals. It reduces the interference contributions in the slices and determines range components of the targets.
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Citations
83 Claims
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1. A method for detecting one or more targets comprising:
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receiving signals including reflections from the one or more targets and interference; computing one or more projections of cross-ambiguity functions of processed or unprocessed received signals and a reference signal; processing the one or more computed projections to reduce interference contribution(s), wherein the processing comprises performing a mathematical operation on a value of the one or more computed projections, said value having angle-Doppler component coordinates; determining an angle and a Doppler component for at least one target based on the processed computed projections; and for the determined angle and Doppler component, determining a corresponding range component for the at least one target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 78)
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36. A system for detecting one or more targets comprising:
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a receiver operable to receive signals including reflections from the one or more targets and interference; and a signal processor comprising; a projection computation module operable to compute one or more projections of cross ambiguity functions corresponding to processed or unprocessed received signals and a reference signal, a projection target estimation module operable to process the one or more computed projections to reduce interference contributions(s) in the one or more computed projections, a projection threshold comparator operable to determine an angle and a Doppler component of at least one target based on the processed one or more projections, and a slice threshold comparator operable to determine a corresponding range component for the at least one target corresponding to the determined angle and Doppler component. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 79, 80, 81, 82, 83)
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52. A machine readable medium having stored thereon data representing sequences of instructions, which when executed by a computer system cause the computer system to perform the steps of:
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computing one or more projections of cross-ambiguity functions of (1) processed or unprocessed received signals that include reflections from one or more targets and interference, and (2) a reference signal; processing the one or more computed projections to reduce interference contribution(s), wherein the processing comprises performing a mathematical operation on a value of the one or more computed projections, said value having angle-Doppler component coordinates; determining an angle and a Doppler component for at least one target based on the processed computed projections; and for the determined angle and Doppler component, determining a corresponding range component for the at least one target. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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Specification