面向单基地MIMO雷达的展开增广互质阵设计：低互耦和高自由度

doi:10.3969/j.issn.0255-8297.2023.06.001

Abstract

Abstract: Aiming at the problem of high mutual coupling rate and low degree of freedom (DOF) of existing multiple input multiple output (MIMO) radar, an unfolded augmented co-prime MIMO radar is proposed in this paper. First, the unfolded augmented co-prime array is deployed in both transmitter and receiver. Then, by introducing the sparse expansion factor, the inter-element spacing of different subarrays in unfolded augmented co-prime array is extended, and the closed-form expression of the position set for the unfolded augmented co-prime MIMO radar is obtained. Then, the generalized sum and different co-array (GSDC) concept is used to derive the closed-form solutions of continuous DOF and total DOF. Finally, the direction of arrival (DOA) is obtained by spatial smoothing multiple signal classification (MUSIC) method. Compared with other co-prime MIMO radar structures, the proposed MIMO radar offers higher DOF and lower mutual rate. Simulation results verify the effectiveness and advantages of the proposed radar structure in DOA estimation.

Key words: multiple input multiple output (MIMO) radar, direction of arrival (DOA) estimation, unfolded augmented co-prime array, mutual coupling rate, degree of freedom (DOF)

CLC Number:

TN95

HAO Honghao, LAI Xin, HAN Shengxinlai, ZHANG Xiaofei. Unfolded Augmented Co-prime Array for MIMO Radar: Low Mutual Coupling and High Degree of Freedom[J]. Journal of Applied Sciences, 2023, 41(6): 911-925.

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Unfolded Augmented Co-prime Array for MIMO Radar: Low Mutual Coupling and High Degree of Freedom

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