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;
determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position; and
determining a first beam position with a first target data value 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, wherein the target data relationship is determined between the first, second, and third beam positions to determine the angular position of the target relative to the first 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.
26 Citations
32 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; determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position; and determining a first beam position with a first target data value 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, wherein the target data relationship is determined between the first, second, and third beam positions to determine the angular position of the target relative to the first beam position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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; determining a target data relationship between at least two beam positions to determine the angular position of the target relative to one beam position; and curve-fitting the target data values to determine the angular position of the target.
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11. 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 (12)
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13. An apparatus for determining an angular position of a target, the apparatus comprising:
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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,wherein the processing circuitry determines a first beam position with a first target data value 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, and wherein the target data relationship is determined between the first, second, and third beam positions to determine the angular position of the target relative to the first beam position. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus for determining an angular position of a target, the apparatus comprising:
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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,wherein the processing circuitry curve-fits the target data values, to determine the angular position of the target.
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23. 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, wherein the second executable portion is further capable of determining a first beam position with a first target data value 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, and wherein the target data relationship is determined between the first, second, and third beam positions to determine the angular position of the target relative to the first beam position. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. 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, wherein the second executable portion curve-fits the target data values to determine the angular position of the target.
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Specification