一种有效的MIMO雷达相干信源波达方向估计方法

摘要

提出了一种基于接收数据样本复用的MIMO雷达相干信源波达方向估计方法.算法利用MIMO雷达发射波形的分集以及MIMO雷达收、发阵列之间的对偶性,对MIMO雷达回波数据矩阵进行了样本复用以等效地增加样本数量,获得基于发射阵和基于接收阵的虚拟子阵接收信号.利用各个子阵之间的平移不变特性计算空间平滑之后的协方差矩阵,提高了相干信源波达方向估计的精度.计算机仿真验证了该方法的有效性.%DOA estimation algorithm of coherent sources for MIMO radar is presented by applying the diversity of the transmitted waveform and the syrmmetry of the transmitting and receiving array. The receiving data samples are reused to increase the number of samples,and obtain the receiving signal of transmitting and receiving virtual sub-arrays. The covariance matrixes of the virtual sub-arrays are derived utilizing the smoothing invariability and the DOA estimation precision is improved. Numerical exampies are simulated to verify the effectiveress of the algorithm.