基于虚拟扩展的超分辨改进MUSIC算法及伪峰抑制

Improved Super-Resolution MUSIC Algorithm with Spurious Peaks Restraining Based on Virtual Arrays

提出一种改进的信号波达方向(DOA)估计的超分辨解决方案,该方法将实际的传感器阵列扩展成多个具有不同的阵列孔径的虚拟阵列,以提高DOA估计的分辨率,然后对这些虚拟阵列得到的空间谱取平均,以抑制阵列孔径扩展导致的虚假谱峰。仿真实验证明了该方法的有效性,并且显示该方法在非相干信号条件下相对于标准MUSIC算法具有更高的近目标分辨率。

A improved super resolution method for estimating the direction-of-arrival （DOA） of signals is presented. The proposed method expands a real sensor array into several virtual arrays to enhance the resolution, each virtual array has a different aperture size which is bigger than the original array＇s, and aperture expanding results in spurious peaks of spatial spectrum, then the proposed method averages the spatial spectrum of the virtual arrays to restrain the spurious peaks. Simulation results show the effectiveness of the method, and prove the method has a higher close-target resolution than standard algorithm for incoherent signals.