基于阵列流型盲辨识的MIMO雷达二维DOD和二维DOA联合估计  

2-D DOD and 2-D DOA Estimation in Bistatic MIMO Radar Based on Blind Identification of Array Manifold

作　　者：陈显舟[1] 杨旭[1] 方海[1] 白琳[1] 陈周[2] CHEN Xian-zhou;YANG Xu;FANG Hai;BAI Lin;CHEN Zhou(China Academy of Space Technology(Xi’an),Xi’an,Shaanxi 710100,China;China Petroleum Pipeline Engineering Corporation,Langfang,Hebei 065000,China)

机构地区：[1]中国空间技术研究院西安分院,陕西西安710100 [2]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《电子学报》2018年第9期2270-2275,共6页Acta Electronica Sinica

摘　　要：MIMO(Multiple Input Multiple Output)雷达基于分集增益理念,使其相对于相控阵雷达,在目标探测、参数测量、多目标分辨及干扰识别和抑制等方面具有明显优势.目标角度估计是雷达目标参数测量的核心内容,也是雷达对空域目标进行定位和跟踪的前提.本文基于双L型阵列,提出了一种高精度低复杂度的双基地MIMO雷达二维离开角和二维到达角联合估计的新算法.通过对匹配滤波后的阵列接收数据进行子空间分解,实现了阵列流形矩阵的盲辨识,进而获得目标二维到达角和二维离开角的闭式解.所提算法估得的收发四维角(二维离开角和二维到达角)能够自动配对,与2-D ESPRIT(Two Dimensional Estimating Signal Parameters via Rotational Invariance Techniques)算法相比,运算复杂度约是其三分之一,角估计性能相当.仿真实验证明了所提算法以较低的运算复杂度,实现了对目标收发四维角的高精度联合估计.Based on the concept of diversity gain,MIMO(Multiple Input Multiple Output)radar has obvious advantages over phased array radar in target detection,parameter estimation,multi-target discrimination and interference identification and suppression.Angle estimation is the core of parameter estimation and also the prerequisite for radar to locate and track spatial targets.A high-resolution and low computational complexity 2-D DOD(Two Dimensional Direction-of-Departure)and 2-D DOA(Two Dimensional Direction-of-Arrival)estimation algorithm based on double L-shaped arrays for bistatic MIMO radar is presented.By performing the eigen-decomposition of the matched array data,the array manifold can be estimated.Furthermore,we can obtain the closed-form solution of the 2-D DOD and 2-D DOA.The proposed method has similar estimation performance with 2-D ESPRIT(Two Dimensional Estimating Signal Parameters via Rotational Invariance Techniques)and the computational complexity is about one third of it.The estimated 2-D DOD and 2-D DOA could be paired automatically.Numerical simulation results show that the proposed method achieves a high-precision four dimensional angle estimation with low computational complexity.

关 键 词：相控阵雷达 MIMO雷达 目标探测 参数测量 二维离开角 二维到达角 双L型阵 

分 类 号：TN958[电子电信—信号与信息处理]