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Adaptive detection method and system for polarized radar extended target 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, improving the detection probability, and suppressing non-uniform strong clutter.

Active Publication Date: 2022-03-04
AIR FORCE EARLY WARNING ACADEMY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[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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  • Adaptive detection method and system for polarized radar extended target in non-uniform environment
  • Adaptive detection method and system for polarized radar extended target in non-uniform environment
  • Adaptive detection method and system for polarized radar extended target in non-uniform environment

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Embodiment Construction

[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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Abstract

The present invention relates to a polarized radar extended target adaptive detection method and system in a non-uniform environment. The system includes: a data matrix construction module, a detection statistic construction module, a detection threshold calculation module and a target judgment module; the method includes: first determining the data to be detected Matrix, training sample matrix and signal matrix, then calculate the detection statistics, then determine the detection threshold, and then compare the size between the detection statistics and the detection threshold, if the detection statistics is less than the detection threshold, then the judgment target does not exist, otherwise, the judgment The target exists. The detector designed by the invention makes full use of the polarization characteristics of electromagnetic waves, realizes the integrated functions of clutter suppression, signal accumulation and constant false alarm processing, has simple structure and excellent performance.

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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Application Information

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Patent Type & Authority Patents(China)
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