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An adaptive detection method under non-uniform clutter and interference conditions

An adaptive detection and non-uniform technology, applied in the field of signal detection, can solve the problem of low target detection performance, achieve the effect of improving target detection performance and suppressing interference and clutter

Active Publication Date: 2022-05-20
AIR FORCE EARLY WARNING ACADEMY
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Problems solved by technology

[0004] For this reason, the present invention provides an adaptive detection method under the condition of non-uniform clutter and interference to overcome the problem of low target detection performance in the prior art

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  • An adaptive detection method under non-uniform clutter and interference conditions
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  • An adaptive detection method under non-uniform clutter and interference conditions

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[0043] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0044] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0045] For multi-channel radars such as phased array or MIMO with N system channels, assuming that there are M interferences in the space, the angle of each interference relative to the normal of the radar array is θ m , where m=1,2,...,M, if there is a target, let the angle of the target relative to the norma...

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Abstract

The invention relates to an adaptive detection method under the condition of non-uniform clutter and interference. Firstly, a sampling covariance matrix is ​​formed by using training samples, and then the square root matrix of the sampling covariance matrix is ​​calculated, and then the detection data is treated with the square root matrix of the sampling covariance matrix. , interference matrix and signal matrix for quasi-whitening processing, and then use the quasi-whitening data to be detected, quasi-whitening interference matrix and quasi-whitening signal matrix to construct detection statistics, and then use the detection statistics and false alarm probability to determine the detection Threshold, finally compare the size between the detection statistic and the detection threshold, if the detection statistic is greater than the detection threshold, then the judgment target exists, otherwise the judgment target does not exist, the detector designed in the present invention can realize detection in the non-uniform clutter Effective suppression of interference and simultaneous target detection.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to an adaptive detection method under non-uniform clutter and interference conditions. Background technique [0002] The environment faced by the radar often presents non-uniform characteristics, that is, the statistical characteristics of the units to be detected are different from those of the training samples, which brings difficulties to radar target detection. In addition, there are often interference released by the enemy or unintentional interference caused by industrial production in the actual environment, which further exacerbates the difficulty of target detection. How to improve the radar target detection performance when there is interference in the non-uniform environment is the key to ensure the normal performance of the radar in the actual combat environment. [0003] The traditional solution often suppresses the interference first, and then uses the consta...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 刘维建王永良陈辉周必雷李槟槟杜庆磊
Owner AIR FORCE EARLY WARNING ACADEMY
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