自己动手修改整理了一些窄带信号的波达方向估计算法程序，包括经典MUSIC算法，求根MUSIC算法，ESPRIT算法和解相干的空间平滑算法。-Modify myself finishing some of the narrowband signal doa estimation algorithm procedures, including classical MUSIC algorithm, root MUSIC algorithm, ESPRIT algorithm and coherent spatial smoothing algorithm.