基于匹配追踪算法的波达方向估计方法

利用辐射源到达方向的稀疏特性,结合最大似然原理提出了一种基于匹配追踪的波达方向估计算法,该算法具有比常用的波束成形和子空间类波达方向估计算法更优越的性能:在给出辐射源到达方向的同时给出对应的幅度输出;不要求辐射源数目的先验知识,无需预处理,且不受来自不同辐射源的信号相关性的影响;在低信噪比和小快拍数下仍具有较好的分辨特性。仿真结果验证了该算法的有效性。

A DOA estimation method based on matching pursuit algorithm

A new direction of arrival （DOA） algorithm based on matching pursuit technique is proposed. The algorithm utilized both the sparse characteristic of the DOAs of emitters and the theorem of maximum likelihood to obtain the arriving angles. Compared with the popular DOA methods, the performance of this method has several advantages, such as, the DOAs and the magnitude of the emitters are given at the same time,the priori knowledge of the number of angles to be resolved and signal preprocessing is not required, the algorithm is not affected by correlation in the arriving signals, and having good resolution under low signal-tonoise ratio and small snapshots. The simulation results show that the proposed algorithm is effective.