基于虚拟阵元信号重构的嵌套阵稳健波束形成

doi:10.12305/j.issn.1001-506X.2021.05.01

Abstract

Abstract:

The inter-sensor spacing of some elements in the nested array is far larger than half a wavelength, which may result in high sidelobe levels, grating lobes. Therefore, by using uniform subarray to estimate the direction of arrival (DOA), a virtual contiguous uniform array is constructed by restoring the received signal on the virtual elements, and the degree of freedom of the beamforming is greatly increased. By estimating the signal power, the interference-plus-noise covariance matrix (INCM) of the virtual contiguous array can be reconstructed, and then the weight vector of the beamforming can be obtained. Simulation results demonstrate that compared with the other beamforming methods, the proposed algorithm has smaller mainlobe width, lower sidelobes, faster convergence speed, and better antiinterference capability.

Key words: beamforming, nested array, virtual elements, signal reconstruction

CLC Number:

TN911.7

Jian LU, Jian YANG, Bo HOU, Zhiyong YU, Guangbin LIU. Robust beamforming of nested array based on virtual elements signal reconstruction[J]. Systems Engineering and Electronics, 2021, 43(5): 1161-1168.

Figures/Tables 8

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Robust beamforming of nested array based on virtual elements signal reconstruction

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