基于传播算子的ROOt-MUSIC算法

摘要

The propagator method (PM) does not need the complicated eigenvalue decomposition and has less computation, but this algorithm has better performance of the DOA estimation only in the condition of high SNR, and its spectrum search are computationally intensive. An improved algorithm (PM-Root-MUSIC) based on propagator method is proposed to solve the problem. Its computational complexity is greatly reduced by using the method of finding the multinomial root instead of the spectrum search and the eigenvalue decomposition. Theoretical analysis and computer simulation results show that the method is effective.%传播算子(PM)法不需要进行复杂的特征值分解,减小了计算量,但仅在信噪比较高的情况下才有较好的波达方向估计性能,且谱峰搜索仍需要较大计算量.在此基础上提出了一种改进的算法PM-Root-MUSIC,它不需要特征值分解,同时用多项式求根代替谱峰搜索,大大减少了计算量.理论分析和计算机仿真结果表明此方法是有效的.