Method, apparatus, and computer program product for radar crossrange superresolution
First Claim
1. A method of determining an angular position of a target, the method comprising the steps of:
- scanning the target with scanning signals at crossrange beam positions such that target data is received from a plurality of beam positions; and
determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position.
1 Assignment
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Accused Products
Abstract
Methods, apparatus, and computer program products are provided for improving the crossrange resolution of a radar device for more accurate determinations of angular position of a target. The radar device transmits and receives scanning signals at crossrange beam positions having a beamwidth, wherein the beam positions are separated by a step. The radar device scans a target to receive target data from at least three beam positions, typically consecutive beam positions, to determine a first beam position with a first target data value that is greater than a second target data value of a second beam position preceding the first beam position and greater than a third target data value of a third beam position following the first beam position. A target data relationship between the first, second, and third beam positions is determined to provide the angular position of the target relative to the first beam position.
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Citations
35 Claims
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1. A method of determining an angular position of a target, the method comprising the steps of:
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scanning the target with scanning signals at crossrange beam positions such that target data is received from a plurality of beam positions; and
determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining an angular position of a target with a radar device, the method comprising the steps of:
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scanning the target with radar signals at crossrange beam positions such that target data is received from at least three consecutive beam positions;
determining a first beam position with a first target data value greater than a second target data value of a second beam position immediately preceding the first beam position and greater than a third target data value of a third beam position immediately following the first beam position;
determining a difference between the second target data value and the third target data value;
dividing the difference by the first target data value to determine a normalized quotient; and
multiplying the normalized quotient by a constant of the radar device to determine the angular position of the target relative to the first beam position. - View Dependent Claims (13)
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14. An apparatus for determining an angular position of a target, the apparatus comprising:
processing circuitry for;
(i) receiving target data from a plurality of beam positions traversed during scanning of the target with scanning signals at crossrange beam positions; and
(ii) determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position.- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A computer program product for determining an angular position of a target, the computer program product comprising a computer-readable storage medium having computer-readable program instructions stored therein, the computer-readable program portions comprising:
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a first executable portion for scanning the target with scanning signals at crossrange beam positions such that target data is received from a plurality of beam positions; and
a second executable portion for determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification