Frequency diverse array based mutual coupling array DOA estimation method

A technology of frequency control array and DOA, which is applied in the field of mutual coupling array DOA estimation based on frequency control array, can solve the problems of failure of MUSIC algorithm and ESPRIT algorithm, and achieve excellent performance, high angle measurement accuracy, and good estimation performance

Active Publication Date: 2019-08-09
TIANJIN UNIV
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Benefits of technology

This technology improves angular measurements with high precision but also keeps good results even if there're significant interference between neighboring elements or other components within an antenna system.

Problems solved by technology

This patented technology describes various techniques used to estimate the orientation/direction of multiple objects simultanously without being affected by interference caused by neighboring devices' electromagnetic fields. These methods include coherence analysis, wavelets transform, partial element decomposition, etc. However, there have also been attempts at solving this challenge.

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  • Frequency diverse array based mutual coupling array DOA estimation method
  • Frequency diverse array based mutual coupling array DOA estimation method
  • Frequency diverse array based mutual coupling array DOA estimation method

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Embodiment Construction

[0059] The invention belongs to the field of array signal processing. According to the characteristics of the angle-distance correlation of the frequency-controlled array array, the output signal of the uniform line array under the consideration of mutual coupling is analyzed and reconstructed, and the sparsely reconstructed parameter estimation framework is applied. In terms of mutual coupling DOA (Direction of Arrival, direction of arrival) estimation, the DOA estimation of the far-field narrowband signal is completed.

[0060] First, based on a uniform linear array to generate a frequency control array signal with a uniform frequency difference, then a selection matrix is ​​constructed to truncate the received data by using the symmetric Toeplitz structure of the mutual coupling matrix (Mutual Coupling Matrix, MCM), so that the remaining data has a cyclic mutual Coupling coefficient. Then, new steering vectors for the truncated data are obtained by including the unknown mut...

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Abstract

The invention relates to a frequency diverse array based mutual coupling array DOA estimation method, belongs to the field of array signal processing, and aims at providing a super-resolution DOA estimation algorithm of a far-field narrowband source. A frequency diverse array signal in uniform frequency difference is generated based on a uniform linear array, a selection matrix is constructed froma symmetric Toeplitz structure of an MCM (Mutual Coupling Matrix) to intercept reception data, so that residual data has a circulated mutual coupling coefficient; the unknown mutual coupling coefficient is included by a source part to obtain a new guiding vector of interception data; singular value decomposition SVD is carried out on a received signal; and the guiding vector is parameterized anda sparse reconstruction theory is used to construct a sparse complete and a convex optimization solution function, and the precision of an estimation result is improved. The method is mainly applied to design and manufacture of a frequency diverse array radar.

Description

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Claims

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Application Information

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Owner TIANJIN UNIV
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