Radar detection method and apparatus
First Claim
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1. A method for detecting an object with a radar system comprising:
- generating a detection table including a plurality of indicators comprising processed radar data from at least two major cycles, with each major cycle having a plurality of minor cycles, each one of the plurality of indicators indicative of the presence of the object, and selected ones of the plurality of indicators indicative of the presence of the object within an equivalent azimuth angle and within equivalent predetermined minimum and maximum ranges corresponding to a predetermined detection zone;
combining at least two of the plurality of indicators to confirm the presence of the object and to provide combined indicators; and
providing an object detection message if the combined indicators are indicative of the presence of the object.
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Abstract
A radar detection process includes computing a derivative of an FFT output signal to detect an object within a specified detection zone. In one embodiment, a zero crossing in the second derivative of the FFT output signal indicates the presence of an object. The range of the object is determined as a function of the frequency at which the zero crossing occurs. Also described is a detection table containing indicators of the presence or absence of an object within a respective radar beam and processing cycle. At least two such indicators are combined in order to detect the presence of an object within the detection zone.
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Citations
18 Claims
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1. A method for detecting an object with a radar system comprising:
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generating a detection table including a plurality of indicators comprising processed radar data from at least two major cycles, with each major cycle having a plurality of minor cycles, each one of the plurality of indicators indicative of the presence of the object, and selected ones of the plurality of indicators indicative of the presence of the object within an equivalent azimuth angle and within equivalent predetermined minimum and maximum ranges corresponding to a predetermined detection zone;
combining at least two of the plurality of indicators to confirm the presence of the object and to provide combined indicators; and
providing an object detection message if the combined indicators are indicative of the presence of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radar system for detecting an object, comprising:
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a memory in which is stored a detection table including a plurality of indicators, comprising processed radar data from at least two major cycles, with each major cycle having a plurality of minor cycles, each one of the plurality of indicators indicative of the presence of the object, and selected ones of the plurality of indicators indicative of the presence of the object within an equivalent azimuth angle and within equivalent predetermined minimum and maximum ranges corresponding to a predetermined detection zone; and
a processor for combining at least two of the plurality of the indicators in the detection table to confirm the presence of the object and to provide combined indicators, and for providing an object detection message if the combined indicators are indicative of the presence of the object. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for detecting an object with a radar system comprising:
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generating a detection table having a plurality of indicators comprising processed radar data from at least two major cycles, with each major cycle having a plurality of minor cycles, each one of the plurality of indicators indicative of the presence of the object;
combining at least two of the plurality of indicators included in the detection table to confirm the presence of the object and to provide combined indicators, the at least two of the plurality of indicators associated with at least two different major cycles and at least two different minor cycles; and
providing an object detection message if the combined indicators are indicative of the presence of the object. - View Dependent Claims (16, 17, 18)
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Specification