MIMO radar DOA estimation method based on sampling data matrix reconstruction

A technology of sampling data and DOA, which is applied in the field of MIMO radar DOA estimation, can solve the problems of missing target data, performance degradation and failure of DOA estimation algorithm, etc., and achieve the effect of improving DOA estimation accuracy, high real-time performance, and low processing complexity

Active Publication Date: 2021-07-09
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0005] When there is an array element failure in the MIMO radar array, a large number of entire rows of target data are missing in the virtual array sampling data matrix, resulting in the performance degradation or even failure of the existing DOA estimation algorithm

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  • MIMO radar DOA estimation method based on sampling data matrix reconstruction
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  • MIMO radar DOA estimation method based on sampling data matrix reconstruction

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Embodiment Construction

[0064] The sampling data matrix of the MIMO radar virtual array has not only rank, but also has sparse characteristics. The solution of the present invention is combined with low rank and sparse priority, not only can dig the correlation between the matrix lines or the elements between the matrix, but also Take advantage of the correlation between the inline or alternative elements, which provides a possible lack of deletion elements in the MIMO radar sampling data matrix under the failure of the recovery. By recovering the missing data of the failure cell, the DOA estimation performance of MIMO radar can be improved.

[0065] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific examples.

[0066] Such as figure 1 As shown, the MIMO radar DOA estimation method based on the sampling data matrix is ​​included, including the following steps:

[0067] Step 1: The emission array and reception...

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Abstract

The invention relates to an MIMO radar DOA estimation method based on sampling data matrix reconstruction. According to the MIMO radar DOA estimation method, array element failure of an MIMO radar is divided into redundant virtual array element failure and non-redundant virtual array element failure. When the redundant virtual array elements fail, the data of the normally working redundant virtual array elements at the same position in the space are averaged to fill the missing data of the failed array elements, so that the influence of the array element failure on the estimation of the target DOA is reduced, the algorithm processing complexity is low, and the real-time performance is high. When non-redundant virtual array elements fail, low-rank and sparse priori of a sampling data matrix of an MIMO radar virtual array is jointly utilized, not only can the inter-row or inter-column correlation of the matrix be mined, but also the intra-row or intra-column correlation can be fully utilized, high-precision reconstruction is carried out on missing elements in the whole row in the data matrix after dimension reduction filling, and the DOA estimation precision of the MIMO radar when the array element fails is effectively improved.

Description

Technical field [0001] The invention belongs to the field of MIMO radar DOA estimation, and more particularly to a MIMO radar DOA estimation method based on a sampling data matrix. Background technique [0002] Multiple-Input Multiple-Output, MIMO "technology has brought new breakthroughs to radar system performance. Compared to traditional radars, MIMO radar has potential advantages in terms of target resolution and parameter estimation, low interception, and clutter suppression. Direction Of Arrival, DOA is estimated to be an important part of the MIMO Radar target parameter estimation, the main DOA estimation methods such as the primary organized sub-space classes and sparse tables. In practical applications, due to the use of aging and harsh environments for a long time of components, physical damage to the antenna element is physically damaged. Since the failure cell is not properly transmitted and received, the MIMO radar has a large amount of failure virtual array in the v...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S3/14
CPCG01S7/41G01S3/14
Inventor 陈金立张程李家强朱艳萍
Owner NANJING UNIV OF INFORMATION SCI & TECH
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