Method for estimating direction of arrival of cross coupling based on atomic norm

A direction estimation and atomic technology, applied in array signal processing and radar fields, can solve problems such as failure of MUSIC algorithm and ESPRIT algorithm

Inactive Publication Date: 2019-04-26
TIANJIN UNIV
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Problems solved by technology

[0005] In the mutual coupling DOA estimation problem, due to the influence of mutual coupling, the traditional MUSIC algorithm and ESPRIT algorithm will fail

Method used

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  • Method for estimating direction of arrival of cross coupling based on atomic norm
  • Method for estimating direction of arrival of cross coupling based on atomic norm
  • Method for estimating direction of arrival of cross coupling based on atomic norm

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Embodiment Construction

[0099] The invention belongs to the field of array signal processing. According to the characteristics that the atomic norm can directly estimate the unknown parameters such as the frequency and phase of the signal in the continuous domain, through the analysis and reconstruction of the output signal of the uniform linear array considering mutual coupling , the atomic norm parameter estimation framework is applied to the mutual coupling DOA (Direction of Arrival, direction of arrival) estimation, and the super-resolution DOA estimation of the far-field narrowband signal is completed.

[0100] In the method proposed by the present invention, first, based on the symmetric Toeplitz structure of the mutual coupling matrix (Mutual Coupling Matrix, MCM), a selection matrix is ​​constructed to truncate the received data, so that the remaining data have cyclic mutual coupling coefficients. Then, new steering vectors for the truncated data are obtained by including the unknown mutual co...

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Abstract

The invention relates to radar and array signal processing and provides a super-resolution DOA estimation method for a far-field narrow-band information source when cross coupling effect exists underthe condition of a uniform linear array. According to the technical scheme, the method comprises the following steps of: firstly, constructing a selection matrix to truncate received data based on a symmetrical Toeplitz structure of a cross coupling coefficient matrix MCM so that residual data has a cyclic cross coupling coefficient; then, obtaining a new guide vector of truncated data by including the unknown cross coupling coefficient into the information source part; finally, carrying out semi-definite programming SDP solution according to the framework of the atomic norm minimization ANM,estimating the frequency component contained in the solution of the SDP by adopting a Prony algorithm, and then completing the direction of arrival estimation according to the corresponding relationship between the frequency and the angle. The method is mainly applied to radar design and manufacture occasions.

Description

technical field [0001] The invention relates to radar and array signal processing, in particular to a mutual coupling direction-of-arrival estimation method based on atomic norm. Background technique [0002] DOA (Direction of Arrival, direction of arrival) estimation has a wide range of applications in radar, sonar, channel detection, wireless communication and other scenarios [1] . The super-resolution problem of the direction of arrival of two or more adjacent signal sources has always been a research hotspot in array signal processing. In addition, how to overcome the mutual coupling effect between the antenna elements of the array in actual conditions is an important issue for signal processing. Another hot spot for DOA estimation from sources. [0003] For the super-resolution estimation of the direction of arrival, with the compressive sensing theory [2,3] The proposal of the sparse representation class parameter estimation method based on mesh division [4,5] It b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 汪清王娴贺爽李辰雨
Owner TIANJIN UNIV
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