A method and system for extended target detection in a non-uniform and disturbed environment

A technology for expanding targets and detection methods, applied to radio wave measurement systems, instruments, etc., to achieve the effects of improving target detection efficiency, simplifying the process, and suppressing non-uniform clutter

Active Publication Date: 2021-07-06
AIR FORCE EARLY WARNING ACADEMY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of extended target detection in the presence of non-uniform clutter and interference, the present invention provides an extended target detection method and system in a non-uniform and interference environment

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  • A method and system for extended target detection in a non-uniform and disturbed environment
  • A method and system for extended target detection in a non-uniform and disturbed environment
  • A method and system for extended target detection in a non-uniform and disturbed environment

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[0045] 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.

[0046] 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.

[0047] Assume that the number of radar system channels is , the target expansion dimension is , then when the data to be detected contains targets, interference, clutter and thermal noise, the data to be detected can be used Dimensional matrix is ​​expressed as:

[0048] (1)

[0049] in, dimension ...

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Abstract

The present invention relates to an extended target detection method and system in a non-uniform and interference environment. The system includes: a data matrix construction module, an intermediate variable matrix calculation module, a detection statistics construction module, a detection threshold determination module, and a target judgment module; the method includes : First construct the data matrix, then use the data matrix to construct the intermediate variable matrix, then use the intermediate variable matrix to construct the detection statistics, then determine the detection threshold according to the false alarm probability and detection statistics set by the system, and finally compare the detection statistics with the detection threshold , and determine whether the target exists. The detection method designed by the invention is based on the self-adaptive detection idea, can completely suppress interference, and is suitable for non-uniform clutter environments. detection.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to an extended target detection method and system in a non-uniform and interference environment. Background technique [0002] With the continuous improvement of radar range resolution capability, radar target echoes often occupy multiple range resolution units, showing the characteristics of expansion, especially for large targets such as large ships and strategic bombers. On the one hand, the improvement of radar range resolution will also reduce the number of strong clutter scattering points contained in a single range unit, improve the signal-to-noise ratio, and benefit the improvement of target detection performance. On the other hand, as the number of strong clutter scattering points contained in the radar range resolution unit decreases, the possibility of clutter scintillation increases, thereby increasing the non-uniform characteristics of the clutter environment, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/292G01S7/35
CPCG01S7/2923G01S7/2927G01S7/354
Inventor 刘维建李槟槟杜庆磊周必雷陈辉王永良
Owner AIR FORCE EARLY WARNING ACADEMY
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