双基地MIMO雷达收发阵列互耦条件下目标定位方法  

Target localization method for the bistatic MIMO radar in the presence of mutual coupling of receiver and transmitter arrays

作　　者：郭艺夺[1] 张永顺[1] 张林让[2] 童宁宁[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2011年第6期82-88,共7页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60601016)

摘　　要：利用均匀线阵互耦矩阵的带状、对称Toeplitz特性,基于子空间原理,提出了一种双基地MIMO雷达目标定位及互耦自校正方法.将对目标二维方位角估计与互耦参数估计相"去耦",不需要任何互耦矩阵信息,且角度估计性能与互耦已知时二维MUSIC算法相近;同时,基于信源二维方位角的精确估计,算法还可以精确地估计出互耦矩阵,从而实现双基地MIMO雷达的互耦自校正.该方法对目标二维方位角与互耦矩阵的联合估计不涉及高维的非线性优化搜索,只需一维搜索,具有较小的计算量.计算机仿真结果证明了本方法的正确性和可行性.By using the banded symmetric and Toeplitz matrix model for the mutual coupling of uniformly linear array（ULA）,a subspace-based target localization and mutual coupling self-calibration method is proposed for the bistatic MIMO radar.The new algorithm can ＂decouple＂ the 2-dimensional（2-D） angles and mutual coupling parameters,and provide a similar estimated performance to 2-D MUSIC without the knowledge of the sensor mutual coupling matrix.At the same time,an accurate estimate of mutual coupling matrix based on the estimated 2-D angles can also be achieved simultaneously for self-calibration of the bistatic MIMO radar.The 2-D angles estimation and mutual coupling estimation can be completed just using one-dimensional search or polynomial rooting,with no high-dimensional nonlinear search and convergence burden involved,so the computatinal cost is low.The correction and efficiency of the proposed method are verified by computer simulation results.

关 键 词：阵列信号处理 MIMO雷达 目标定位 互耦 

分 类 号：TN957[电子电信—信号与信息处理]