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Polarization feature extraction method based on channel fusion

An extraction method and polarization feature technology, applied in the field of radar signal processing, can solve the problems of high misjudgment rate of similar targets, few scattering types, and insufficient description of physical characteristics

Active Publication Date: 2019-02-01
CNGC INST NO 206 OF CHINA ARMS IND GRP +1
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Problems solved by technology

[0030] Pauli decomposition is easy to deduce and understand, and the amount of calculation is small, but there are few types of scattering, only odd scattering and even scattering, the description of physical characteristics is not fine enough, and the misjudgment rate for similar targets is high

Method used

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  • Polarization feature extraction method based on channel fusion
  • Polarization feature extraction method based on channel fusion
  • Polarization feature extraction method based on channel fusion

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Embodiment Construction

[0063] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0064] The solution to the technical problem of the present invention is: channel fusion is performed on the echoes received by the two receiving channels of the same polarization and cross polarization in the dual-polarization radar, and the data of the fusion channel is detected and the target is extracted to obtain the height of the fusion channel. After the one-dimensional range profile (HRRP) is resolved, the features of the target are extracted based on the fused HRRP, and then the extracted features can be used for target classification and recognition. The four polarization characteristics of the target involved in the present invention include polarization ratio, polarization scattering center number, helical component, and polarization second-order moment, and these four characteristics are all based on the data after channel fusion.

[0065] The core a...

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Abstract

The invention discloses a polarization feature extraction method based on channel fusion, which is used for radar polarization feature extraction. The invention solves the problem that the inaccuracyof the polarization scattering matrix in the traditional polarization feature extraction method causes the inaccuracy of the polarization feature extinction, thereby affecting the polarization classification and recognition. The processing flow of the fast implementation method is channel fusion + feature extraction. The polarization feature extraction method based on channel fusion does not needto estimate the polarization scattering matrix, avoids the influence of the accuracy of the polarization scattering matrix on the polarization feature extraction. The method does not require matrix operation, and the calculation amount is also greatly reduced, which is suitable for engineering implementation.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to radar polarization feature extraction, and proposes a polarization feature extraction method based on channel fusion. The algorithm first performs channel fusion on polarization channels to form a single channel, and the received data of the single channel The polarized feature is extracted, and the extracted polarized feature is used for target recognition. Background technique [0002] With the increasing maturity of polarization measurement technology and the substantial improvement of radar signal processing capabilities, new types of radars with dual polarization or full polarization are emerging rapidly. The polarization characteristics of targets have become a research hotspot in the field of radar signal processing, and the polarization characteristics especially show great potential in target recognition. When multiple targets (including interference and clutter) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/411
Inventor 戴巧娜郭鹏程任泽宇倪宁赵平
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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