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

应用科学学报 ›› 2023, Vol. 41 ›› Issue (6): 911-925.doi: 10.3969/j.issn.0255-8297.2023.06.001

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

郝鸿浩, 赖欣, 韩盛欣来, 张小飞

南京航空航天大学电子信息工程学院, 江苏南京 210016

收稿日期:2022-02-22 出版日期:2023-11-30 发布日期:2023-11-30
通信作者: 张小飞，教授，博导，研究方向为阵列信号处理、移动通信技术。E-mail:zhangxiaofei@nuaa.edu.cn E-mail:zhangxiaofei@nuaa.edu.cn
基金资助:
国家自然科学基金（No.61971217,No.61971218,No.61631020）；江苏省科学基金（No.BK20200444）；江苏省重点研究发展项目（No.2020YFB1807602）资助

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

HAO Honghao, LAI Xin, HAN Shengxinlai, ZHANG Xiaofei

Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

Received:2022-02-22 Online:2023-11-30 Published:2023-11-30

摘要/Abstract

摘要： 针对现有多输入多输出（multiple input multiple output,MIMO）雷达互耦率高、自由度低的问题，提出了一种低互耦率、高自由度的展开增广互质阵MIMO雷达设计方式。首先在收发两端分别部署展开增广互质阵列。然后通过引入稀疏扩展因子，使展开增广互质阵列子阵的阵元间隔得到扩展，并得到所提出的展开增广互质MIMO雷达阵元位置的闭式表达式。随后通过广义和差联合阵列的概念，详细推导出了雷达的连续自由度和总自由度的闭式解。最后通过基于空间平滑的多重信号分类方法得到波达方向（direction of arrival,DOA）估计。与其他互质MIMO雷达结构相比，所提出的展开增广互质MIMO雷达能够获得更多的连续自由度并具有更低的互耦率。仿真结果验证了所提出的雷达结构在DOA估计方面的有效性和优势。

关键词: 多输入多输出雷达, 波达方向估计, 展开增广互质阵, 互耦率, 自由度

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)

中图分类号:

TN95

郝鸿浩, 赖欣, 韩盛欣来, 张小飞. 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[J]. 应用科学学报, 2023, 41(6): 911-925.

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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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

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

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