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Signal reconstruction method and device and radar

A technology of signal reconstruction and required signal, applied in the field of radar, which can solve the problems of increased complexity of SAMP algorithm and unfavorable practical application.

Pending Publication Date: 2020-12-11
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology

However, as the sparsity K increases, the complexity of the SAMP algorithm increases sharply, which is not conducive to practical applications.

Method used

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  • Signal reconstruction method and device and radar
  • Signal reconstruction method and device and radar
  • Signal reconstruction method and device and radar

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Embodiment Construction

[0054] Embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.

[0055] Embodiments of the present disclosure are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. The present disclosure can also be implemented or applied through different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, a...

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Abstract

The embodiment of the invention provides a signal reconstruction method and device and radar, which belong to the technical field of radar. The method comprises the steps that radar signals are transmitted to a preset area, and echoes of the radar signals are received, wherein the echoes comprise needed signals and clutters; according to the echo of the radar signal, a support set of a required signal in the echo isexpanded by utilizing a base atom iterative expansion method based on subspace tracking; and the required signal isreconstructed according to the support set of the required signal,and clutters in the echo are suppressed. The sparse recovery STAP algorithm based on extended subspace pursuit (ESP) can realize accurate estimation of a clutter covariance matrix under a small number of training samples, and realize effective clutter suppression, thereby obtaining higher signal-to-noise ratio improvement in an actual clutter environment.

Description

technical field [0001] The present disclosure relates to the technical field of radar, in particular to a signal reconstruction method, device and radar. Background technique [0002] In the actual complex environment, because the uniform distribution of sample data is difficult to be guaranteed, it is difficult to improve the performance of STAP filtering by dimension reduction methods and rank reduction methods. For this reason, many scholars have proposed the non-uniform STAP method. At present, the non-uniform STAP methods mainly include: power non-uniform suppression method, non-uniform detector, clutter distance-dependent compensation method, direct data domain (DDD) algorithm and prior knowledge-based STAP (KB-STAP) algorithm. With the development of sparse technology, some scholars have introduced the sparse recovery (SR) technology into the STAP method, resulting in a sparse recovery-based STAP (SR-STAP) method, which utilizes the space-time The sparsity of the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/292G01S13/10
CPCG01S7/2922G01S13/10
Inventor 韩晓东周运运陆臻
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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