双基地MIMO雷达相干多目标快速定位算法  

Coherent Multi- Target Fast Localization for Bistatic MIMO Radar Based on Single Snapshot

作　　者：陈群 张旭 

机构地区：[1]洛阳师范物理信息学院,洛阳471022

出　　处：《电子信息对抗技术》2015年第2期10-15,78,共7页Electronic Information Warfare Technology

摘　　要：针对双基地MIMO雷达相干多目标角度估计的实时性问题,提出一种快速定位算法。算法采用单次快拍数据构建一组Toeplitz矩阵重构出新的协方差矩阵,该矩阵的秩等于目标的总个数,而与目标源的相干性无关;通过对新构建的矩阵进行centro-Hermitian矩阵变换,利用酉变换将复矩阵转化为实矩阵,进行实数域的协方差矩阵构造和参数求解,避免了复矩阵特征分解所带来的巨大运算复杂度。运用ESPRIT算法估计出目标的发射角和接收角。仿真表明:该算法能够有效地估计出相干目标的收发角且实现自动配对,并大大降低了运算复杂度;与文献算法相比,具有更高的估计精度和稳健性。A new fast algorithm based on one single snapshot is proposed for the instantaneity and decorrelation problems among coherent multi-target localization for MIMO radar. One single snapshot received data is used to construct a set of Toeplitz matrices and a new received data ma- trix is reconstructed. It is shown that the rank of the new received data matrix is equal to the number of the targets, and is independent of the coherency of targets. Through the matrix trans- formation of the new reconstructed matrix, the complex-value covariance matrix can be turned into a real-value field by unitary transformation and parameter estimation in a real-valued field can be realized. The high computational complexity of eigen-value decomposition in a complex- valued field is avoided. The ESPRIT algorithm can directly be applied to estimate the Direction of Departure （DOD） and the Direction of Arrival （DOA）. The simulation results illustrate that： the DOD and DOA of the coherent target can be estimated efficiently with automatic pairing, and the computational complexity is very low. Comparing to the reference algorithms, the proposcd method provides better estimation performance and robustness.

关 键 词：双基地MIMO雷达 相干多目标 快速定位 单次快拍 centro-Hermitian矩阵变换 

分 类 号：TN953.7[电子电信—信号与信息处理]