MIMO雷达嵌套平行阵下基于子空间的目标二维波达角估计

发布时间：2018-01-28 19:21

本文关键词： 多输入多输出雷达嵌套平行阵二维角度估计酉变换子空间　出处：《系统工程与电子技术》2017年03期 　论文类型：期刊论文

【摘要】：研究了多输入多输出(multiple input multiple output,MIMO)雷达中的二维波达角(direction of arrival,DOA)估计问题,并提出了一种嵌套平行阵下基于子空间的二维DOA估计算法。利用存在嵌套关系的双平行阵(two parallel uniform linear array,TPULA)作为收发阵列,大大增加了自由度(degree of freedom,DOF)。在DOA估计方面,算法利用数据重构增加虚拟脉冲数,并利用酉变换降低运算复杂度,然后分别基于信号子空间和噪声子空间获得了自动配对的二维DOA估计的闭式解。算法复杂度低,而且相比MIMO雷达中传统TPULA下的算法,该算法拥有更好的角度估计性能,并可辨别空间相干目标。仿真结果验证了算法的有效性。
[Abstract]:Multiple input multiple output with multiple inputs and outputs were studied. The problem of two-dimensional DOA direction estimation in MIMO-radar. A subspace-based two-dimensional DOA estimation algorithm for nested parallel arrays is proposed. Two parallel uniform linear array. As a transceiver array, the degree of freedom is greatly increased. In the aspect of DOA estimation, the algorithm uses data reconstruction to increase the number of virtual pulses. The unitary transform is used to reduce the computational complexity, and then the closed solution of 2-D DOA estimation is obtained based on the signal subspace and the noise subspace, respectively. The algorithm complexity is low. Compared with the traditional TPULA algorithm in MIMO radar, this algorithm has better angle estimation performance and can distinguish spatial coherent targets. The simulation results show that the algorithm is effective.
【作者单位】：河海大学计算机与信息学院;南京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金(61371169,61601167) 中央高校基本科研业务费专项资金(2015B12614) 江苏高校优势学科建设工程资助课题
【分类号】：TN958
【正文快照】： 网络优先出版地址:http://www.cnki.net/kcms/detail/11.2422.TN.20161115.1408.002.html0引言多输入多输出(multiple input multiple output,MIMO)雷达利用多个天线同时发射信号,并利用多个天线接收目标回波,因此能充分利用多径信息增大系统自由度(degree offreedom,DOF),提

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