MIMO雷达DOA估计阵列设计

 多输入多输出（MIMO）雷达的关键技术之一是天线阵列的设计。由于MIMO雷达同时增加了收发两端的相位中心，使得系统具有更高的空间分辨率和更多的自由度。论文从接收信号模型出发，对MIMO雷达发射正交信号的等效阵列进行了讨论，以波达方向估计为目标提出了一种MIMO雷达天线阵的设计方法，通过抛物线理论得出了收发组合的唯一性和合理性，然后通过分析各种收发组合给出了发射阵元的最佳间隔设置。推导了几种情景下的MIMO收发阵列最佳设计解析解，最后进行了仿真实验。仿真结果验证了算法的有效性。

Array Design of MIMO Radar Estimation of DOA

One of the key aspects of a multiple-input multiple-output(MIMO) radar system is its array design. Because of the augmented phase centers of transmitter and receiver, the resolution and degrees of freedom can be improved. This article commences with signal model, and discusses the equivalent array of orthogonal signals. The principles and methods of the MIMO array design are proposed aimed at the estimation of direction of arrival (DOA). Exclusivity and rationality of the combination of transmitter-receiver array are obtained through parabola theories. Then optimum interelement spacing of transmitter array is given by analyzing different combinations of the transmitter-receiver array. An optimal analytical solution of the array design under some conditions is also given, and the simulation is carried out. The effectiveness of the method is verified by simulation results.