Polarization radar extended target adaptive detection method and system in non-uniform environment
An adaptive detection and polarization radar technology, applied in the research field of adaptive target detection, can solve problems such as low detection performance, and achieve the effects of shortening the required time, suppressing non-uniform strong clutter, and improving the detection probability
Active Publication Date: 2021-06-25
AIR FORCE EARLY WARNING ACADEMY
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[0004] The invention provides a polarized radar extended target adaptive detection method and system in a non-uniform environment to overcome the problem of low detection performance in the prior art
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[0046] 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.
[0047] 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.
[0048] Assuming that the phased array radar uses a fully polarized antenna, the number of antenna elements for each polarization is N, and assuming that the angle of the target relative to the normal of the radar array is θ, then the received data s of the polarization of the radar can be expressed as:
[0049...
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The invention relates to a polarization radar extended target adaptive detection method and system in a non-uniform environment. The system comprises a data matrix construction module, a detection statistic construction module, a detection threshold calculation module and a target judgment module. The method comprises the steps of firstly determining a to-be-detected data matrix, a training sample matrix and a signal matrix, then calculating a detection statistic, then determining a detection threshold, comparing the detection statistic with the detection threshold, if the detection statistic is smaller than the detection threshold, judging that a target does not exist, and otherwise, judging that the target exists. According to the detector designed by the invention, the polarization characteristic of electromagnetic waves is fully utilized, the integrated function of clutter suppression, signal accumulation and constant false alarm processing is realized, the structure is simple and convenient, and the performance is excellent.
Description
technical field [0001] The invention relates to the technical field of signal detection, in particular to research on self-adaptive target detection in a clutter environment. Background technique [0002] Polarization is one of the inherent properties of electromagnetic waves. If the radar can make full use of the polarization information of the target, the detection performance of the radar can be greatly improved. However, the working environment of radar is complex and changeable, and besides thermal noise and possible target signals, there are often a lot of clutter in the radar received data. On the one hand, the power of clutter is far greater than the echo power of the target; on the other hand, the echo power of different terrain and objects varies greatly, showing non-uniform characteristics. Both of the above two aspects pose serious challenges to the improvement of radar target detection performance in the background of non-uniform strong clutter. [0003] In o...
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Login to View More IPC IPC(8): G01S13/00G01S13/04G01S7/41
CPCG01S13/006G01S13/04G01S7/415
Inventor 刘维建李槟槟周必雷杜庆磊陈辉王永良
Owner AIR FORCE EARLY WARNING ACADEMY