Method for detecting target in clutter subspace based on multistatic radar

A clutter subspace and target detection technology, which is applied in the field of radar, can solve the problems of target constant false alarm detection, etc., and achieve the effect of reducing the bandwidth of transmission information, improving detection performance, and reducing complexity

Active Publication Date: 2018-07-24
XIDIAN UNIV
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Problems solved by technology

However, in actual radar work, local radar stations often receive interference from the clutter subspace, and the above method cannot perform constant false alarm detection on targets

Method used

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  • Method for detecting target in clutter subspace based on multistatic radar
  • Method for detecting target in clutter subspace based on multistatic radar
  • Method for detecting target in clutter subspace based on multistatic radar

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Embodiment Construction

[0025] refer to figure 1 , the implementation steps of the present invention are as follows:

[0026] Step 1. Collect the radar echo signal to obtain the N×L×(K+1)-dimensional original data matrix X:

[0027] X=[X 1 ,X 2 ,...,X n ,...,X N ],

[0028] Among them, X n Denotes the original data in the nth space diversity channel, X n It is a matrix of L×(K+1) dimension, which is expressed as follows:

[0029]

[0030] where x nls Represents the s+1th data of the lth pulse in the nth space diversity channel, n=1,2,...,N, N is the number of space diversity channels, l=1,2,...,L , L is the number of pulses contained in a non-coherent accumulation cycle, when s=0, x nls Represents the detection unit information, when s=1,2,...,K, x nls Represents the reference unit information near the detection unit, and K represents the number of reference units near the detection unit.

[0031] Step 2. Perform a generalized likelihood ratio test on the original data matrix X to obta...

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Abstract

The invention discloses a method for detecting a target in a clutter subspace based on multistatic radar, which is mainly used to solve the problem that the method in the prior art requires a large amount of calculation and has low detection performance. The method includes the following steps: (1) echo data is collected; (2) generalized likelihood ratio detection is carried out on the collected echo data to obtain a local test statistic; (3) the local test statistic is transmitted to a fusion center, and the fusion center calculates a global test statistic according to the local test statistic; (4) a detection threshold is calculated; and (5) the global test statistic is judged according to the detection threshold; if the global test statistic is greater than the detection threshold, a target is judged to exist; otherwise, no target exists. The target detection performance of multistatic radar in a clutter subspace is improved. Moreover, the method requires little amount of calculation, has a wide range of application, and can be used in a target detection system based on multistatic radar.

Description

technical field [0001] The invention belongs to the technical field of radar, and specifically relates to a target detection method in a clutter subspace, which can be used in a multibase radar target detection system. Background technique [0002] In a multistatic radar system, in order to obtain the optimal detection performance under certain criteria, it is usually necessary for each radar station to transmit all received signals to the fusion center, which undoubtedly requires a large communication transmission bandwidth. If optical fiber communication is used, other The communication bandwidth can easily meet the data transmission requirements, but this wired connection limits the mobility and flexibility of the radar station. However, for mobile platforms such as airborne radar and shipborne radar, it is necessary to transmit radar echo data to the processing center through wireless transmission. In this case, the signal transmission bandwidth often cannot meet the da...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/00G01S13/02G01S7/41
CPCG01S7/41G01S13/003G01S13/02
Inventor 苏洪涛李志华刘宏伟赵永波
Owner XIDIAN UNIV
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