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Atomic norm mutual coupling DOA estimation method based on auxiliary array element

An array element and atom technology, which is applied in the field of atomic norm mutual coupling DOA estimation system, and can solve problems such as the failure of MUSIC algorithm and ESPRIT algorithm.

Inactive Publication Date: 2019-07-26
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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  • Atomic norm mutual coupling DOA estimation method based on auxiliary array element
  • Atomic norm mutual coupling DOA estimation method based on auxiliary array element
  • Atomic norm mutual coupling DOA estimation method based on auxiliary array element

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Embodiment Construction

[0107] Aiming at the problem of aperture loss in literature [15], the present invention proposes an algorithm that uses auxiliary array elements to perform structural compensation on the mutual coupling coefficient matrix, and then uses the atomic norm framework to perform DOA estimation.

[0108] The technical solution of the present invention is, firstly, by analyzing the Toeplitz structure of the mutual coupling coefficient matrix (Mutual Coupling Matrix, MCM) without auxiliary array elements, and constructing a construction selection matrix in a symmetrical manner 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 coupling coefficients into the source part. Finally, according to the framework of Atomic Norm Minimization (ANM), a Semidefinite Programming (SDP) problem of the mutual coupling DOA estimation model is proposed. In addi...

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Abstract

The invention belongs to the field of array signal processing.To propose a super-resolution DOA estimation technical scheme of a far-field narrow-band information source,according to anatomic norm mutual coupling DOA estimation method based on an auxiliary array element, by analyzing the Toeplitz structure of a mutual coupling coefficient matrix MCM without an auxiliary array element, aconstruction selection matrix is constructed in a symmetrical manner to intercept received data, so that remaining data has cyclic mutual coupling coefficients; by including unknown mutual coupling coefficientsinto an information source part, a new steering vector of the intercepted data is obtained; the ANM framework is minimized according to an atomic norm, semi-definite programming (SDP) solution of a mutual coupling DOA estimation model is conducted, and the Prony method describing equally spaced sampling data is used for estimatingfrequency components included in x(t),and then the estimation of direction of arrival of the input far-field narrow-band information source is completed based on the corresponding relationship between frequency f and incident angle theta. The atomic norm mutual coupling DOA estimation method based on the auxiliary array element is mainly applied to array signal processing situations.

Description

technical field [0001] 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, under the condition of considering mutual coupling factors, the ULA (Uniform Linear Array, uniform line After adding auxiliary array elements at both ends of the array), the super-resolution DOA (Direction of Arrival, direction of arrival) estimation of the far-field narrowband signal is completed by using the atomic norm parameter estimation framework. It specifically relates to an atomic norm mutual coupling DOA estimation system and method based on auxiliary array elements. Background technique [0002] DOA 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 sign...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 汪清王娴滕立平李辰雨
Owner TIANJIN UNIV
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