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A polarization radar weighted extended target detection method and system when signals are mismatched

A technology for extended target and polarized radar, applied in the field of polarized radar weighted extended target detection, can solve problems such as poor detection performance of mismatched signals, achieve the effects of excellent detection performance, simplified detection process, and improved detection efficiency

Active Publication Date: 2022-03-08
AIR FORCE EARLY WARNING ACADEMY
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Problems solved by technology

[0005] In order to overcome the poor detection performance of existing polarization radar target detectors for mismatched signals, the present invention provides a polarization radar weighted extended target detection method and system when signals are mismatched, including the following steps:

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  • A polarization radar weighted extended target detection method and system when signals are mismatched
  • A polarization radar weighted extended target detection method and system when signals are mismatched
  • A polarization radar weighted extended target detection method and system when signals are mismatched

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Embodiment Construction

[0055] 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.

[0056] 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.

[0057] Assuming that the number of radar system channels is M, and the target expansion dimension is K, then when the data to be detected contains targets and noise, the data to be detected can be expressed as an N×K dimensional matrix:

[0058] X=HA+N (1)

[0059] Among them, N=3M, N×p dimensional matrix H r...

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Abstract

The present invention relates to a polarization radar weighted extended target detector and system when signals are mismatched. The variance matrix is ​​quasi-whitened for the data to be detected and the signal matrix, and then the quasi-whitened data is used to construct the detection statistic, and the detection threshold is determined according to the false alarm probability and detection statistic set by the system, and finally the detection statistic and the detection threshold are compared , if the detection statistic is less than the detection threshold, it is determined that the target does not exist, and if the detection statistic is greater than or equal to the detection threshold, it is determined that the target exists. The detector designed by the invention has robust detection characteristics for the target, is an integrated detection method, and can realize efficient target detection without independent filtering and constant false alarm processing steps.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to a polarized radar weighted extended target detection method and system when signals are mismatched. Background technique [0002] Polarization is an inherent property of electromagnetic waves. Components of a polarized electromagnetic wave include horizontally polarized components, vertically polarized components, and cross-polarized components. However, conventional radar can only provide information on a single polarized electromagnetic wave component. If the polarization information of electromagnetic waves can be fully utilized, the performance of radar detection can be greatly improved. With the improvement of the radar manufacturing process, various performance indicators of the radar are continuously improved. Among them, the distance resolution of the radar is continuously enhanced, and the corresponding distance resolution is continuously reduced, and the rada...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/418G01S7/411
Inventor 刘维建周必雷李槟槟杜庆磊陈辉王永良
Owner AIR FORCE EARLY WARNING ACADEMY
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