高斯色噪声背景下双基地MIMO雷达的多目标定位  

Multitarget Localization for Bistatic MIMO Radar in Gaussian Colored Noise

作　　者：郑志东[1] 时军学 徐浩彭[1] 

机构地区：[1]北方电子设备研究所,北京100191

出　　处：《探测与控制学报》2016年第6期68-73,79,共7页Journal of Detection & Control

摘　　要：针对雷达实际环境中的高斯色噪声背景,提出了基于ESPRIT-like的双基地MIMO雷达多目标定位方法。首先利用接收信号构造四阶累积量,然后根据新的联合导向矢量的特殊结构,对四阶累计量数据实施行抽取运算,提取出发射和接收"扩展"旋转不变因子,并基于ESPRIT-like方法估计出目标的发射角和接收角,最后利用复矩阵法实现了目标收发角度的配对。理论和仿真实验表明:该方法不受接收阵元数目的限制,不需要解相位模糊问题,在低信噪比时,角度估计性能优于已有的相关算法,在高信噪比时,角度估计性能接近于根克拉美罗界。A new ESPRIT-like method of multitarget localization for bistatic MIMO radar in gaussian colored noise was proposed. Firstly, the fourth-order cumulant was constructed by using the receive signal. Then, ac-cording to the special structure of the new joint steering vector, the extended rotation invariant matrices of the transmitter and receiver arrays were extracted by performing the row selection operation on the joint steering vector. The direction of departure （DOD） and direction of arrival （DOA） of target was estimated by using the ESPRIT-like method. Finally, a complex matrix algorithm was utilized to paring the correct targets. Theoretical analyses and computer simulations showed that the proposed method did not limit to the restriction on the num-ber of the receive element, and did not need to solve the phase ambiguity problem. The estimation performance of the proposed method was better than that of the existing methods in the low signal noise ratio （SNR） , and was closed to the Root-CRB in the high SNR.

关 键 词：双基地MIMO雷达 高斯色噪声 多目标定位 扩展旋转不变因子 

分 类 号：TN953[电子电信—信号与信息处理]