互质MIMO雷达二维DOA估计新方法  

A New Method of Two-Dimensional DOA Estimation for Coprime MIMO Radar

作　　者：章飞[1,2] 张子菁 杨绿溪[1] ZHANG Fei;ZHANG Zijing;YANG Lyuxi(Southeast University,Nanjing 210000,China;Jiangsu University of Science and Technology,Zhenjiang 212000,China)

机构地区：[1]东南大学,南京210000 [2]江苏科技大学,江苏镇江212000

出　　处：《电光与控制》2022年第6期16-20,共5页Electronics Optics & Control

基　　金：国家自然科学基金(61801170,61801435)。

摘　　要：针对传统波达方向(DOA)估计方法无法在提高自由度(DOF)的同时高精度地处理多信源的问题,提出了一种新的基于互质阵列的MIMO雷达二维DOA估计方法(SM-MIMO-CA)。该方法根据一种新的基于MIMO阵列的互质阵列模型(MIMO-CA),改善了在有限阵元数时对多信源估计的精度,以较少的阵元数目获得了更大的阵列孔径,提高了二维DOA估计精度。最后通过实验验证了所提出的SM-MIMO-CA方法在提高阵列自由度和提高DOA精度方面的有效性和可靠性。Aiming at the problem that traditional Direction of Arrival(DOA) estimation methods cannot process multiple sources with high accuracy while improving Degree of Freedom(DOF),a new two-dimensional DOA estimation method for MIMO radar based on the coprime array(SM-MIMO-CA) is proposed.This method is based on a new MIMO array-based coprime array model(MIMO-CA),which improves the accuracy of multi-source estimation when the number of elements is finite,and a larger array aperture is obtained with a smaller number of elements,which improves the accuracy of two-dimensional DOA estimation.Finally,the effectiveness and reliability of the SM-MIMO-CA method in improving DOF and improving DOA accuracy are verified through experiments.

关 键 词：二维DOA MIMO 互质阵列 稀疏阵列 

分 类 号：TN958.91[电子电信—信号与信息处理]