基于空时矩阵的双基地MIMO雷达目标参数估计

建立了双基地多输入多输出（multiple input multiple output，MIMO）雷达信号模型，提出了一种目标发射角、接收角及多普勒频率联合估计方法。通过对接收数据协方差矩阵进行特征值分解估计目标个数，根据目标数构造空时矩阵，对所构造矩阵进行特征值分解，即可得到雷达目标多个参数的闭式解。该方法针对不同目标数的情况进行了讨论，所构造空时矩阵的维数较小，并且避免了多维非线性的谱峰搜索，还可实现自动配对，算法复杂度较低。仿真结果证明了所提算法的有效性。

Dspace-time matrix method for target parameters estimation in bistatic MIMO radar

This paper sets up a signal model of bistatic MIMO radar, and proposes an algorithm for joint direction of arrival direction of departure and Doppler frequency estimation. Firstly, the proposed method can get the number of targets by using eigenvalue decomposition to the covariance matrix of received data. Secondly, it defines a space-time matrix according to the acquired number. Then it can get closed-form solutions of the multi-target parameters by using eigenvalue decomposition. The method has discussed different situations of different number of targets, the dimension of the space-time matrix is smaller. In addition, the multi-dimensional nonlinear peak search is avoided, and the pairing of the parameters is automatically obtained. So the degree of complexity of the algorithm is lower. The simulation results show the effectiveness of the proposed algorithm.