Apparatus and method for instantly automatic detecting clutter blocks and interference source and for dynamically establishing clutter map
First Claim
1. An apparatus for instantly automatic detecting clutter blocks and an interference source and for dynamically establishing a clutter map used for a radar system, comprising:
- a clutter block detecting module, receiving a plurality of range cell data, wherein each of the range cell data represents an echo intensity at a different distance of a radar beam area with an elevation and an azimuth in the detection space of the radar system respectively;
the radar beam areas are divided into a plurality of detecting areas according to a predetermined range and when an accumulated value of a range cell data in a detecting area is larger than a clutter block level, the detecting area is defined as a clutter block;
an interference source detecting module, receiving a plurality of range cell data, used for accumulating the range cell data of each radar beam area, followed by comparing the accumulated value with an interference source reference level to detect whether an interference source exists; and
a clutter map establishing module, generates a plurality of the clutter map cell according to the range cells and the clutter map cells on different beam area store in three memory blocks sequentially, when one of the clutter map cells is extracted, two clutter map cells on adjacent beam area are also extracted, the largest value among the three clutter map cells regards as a clutter map threshold value to detect the target.
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Abstract
An apparatus for detecting clutter blocks and an interference source for dynamically establishing a clutter map includes a clutter block detecting module accumulates a plurality of range cell data of each detecting area, and compares the accumulated value with a clutter block level to define the position of a clutter block; a interference source detecting module accumulates all range cell data in each radar beam area, and compares the accumulated value with an interference source reference level to detect whether any interference source exists; and a clutter map establishing module saves the clutter maps on different beam areas in three memory blocks. When one clutter map cell is extracted, the clutter map cells on different beam areas neighboring with the beam area saving extracted clutter map cell are also extracted. The largest value among the extracted clutter map cells is being a clutter threshold value of a detected target.
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Citations
20 Claims
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1. An apparatus for instantly automatic detecting clutter blocks and an interference source and for dynamically establishing a clutter map used for a radar system, comprising:
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a clutter block detecting module, receiving a plurality of range cell data, wherein each of the range cell data represents an echo intensity at a different distance of a radar beam area with an elevation and an azimuth in the detection space of the radar system respectively;
the radar beam areas are divided into a plurality of detecting areas according to a predetermined range and when an accumulated value of a range cell data in a detecting area is larger than a clutter block level, the detecting area is defined as a clutter block;an interference source detecting module, receiving a plurality of range cell data, used for accumulating the range cell data of each radar beam area, followed by comparing the accumulated value with an interference source reference level to detect whether an interference source exists; and a clutter map establishing module, generates a plurality of the clutter map cell according to the range cells and the clutter map cells on different beam area store in three memory blocks sequentially, when one of the clutter map cells is extracted, two clutter map cells on adjacent beam area are also extracted, the largest value among the three clutter map cells regards as a clutter map threshold value to detect the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for instantly detecting clutter blocks, suitable for a radar system, comprising the following steps:
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receiving a plurality of range cell data, wherein each of the range cell data represents an echo intensity at a different distance of a radar beam area with an elevation and an azimuth in the detection space of the radar system, respectively; dividing each of the radar beam areas into a plurality of detecting areas, wherein each detecting area comprises a preset number of range cell data; accumulating all the range cell data of each detecting area to obtain corresponding accumulated values; extracting the accumulated values of each detecting area; comparing the accumulated value of each detecting area with a clutter block level to get a comparison result; and deciding whether each of the detecting areas is a clutter block according to the comparison results. - View Dependent Claims (14, 15)
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16. A method for instantly detecting an interference source, suitable for a radar system, comprising the following steps:
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receiving a plurality of range cell data, wherein each of the range cell data represents an echo intensity at a different distance of a radar beam area with an elevation and an azimuth in the detection space of the radar system, respectively; accumulating all the range cell data of each radar beam area to obtain corresponding accumulated values; extracting the accumulated value of each radar beam area to obtain a value; comparing the value of each radar beam area with an interference source reference level to get a comparison result; and deciding whether an interference source exists at each of the radar beam area direction according to the comparison results. - View Dependent Claims (17)
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18. A method for establishing a clutter map, suitable for a radar system, comprising the following steps:
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receiving a plurality of range cell data, wherein each of the range cell data represents an echo intensity at a different distance of a radar beam area with an elevation and an azimuth in the detection space of the radar system respectively; collapsing all range cells of each radar beam area into a plurality of range collapsing cells and each range collapsing cell comprises a predetermined number of range cells; dynamically processing each range collapsing cell and original clutter map cell at the same position, and obtaining a new clutter map cell; storing all clutter map cells on the selected elevation layer in three memory blocks respectively; and when one of the clutter map cells is extracted, two clutter map cells on adjacent beam area are also extracted, the largest value among the three clutter map cells is regarded as a clutter threshold value to detect the target. - View Dependent Claims (19, 20)
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Specification