music静态DOA，经典算法，附有详细注释，适合学习。直接运行，是两个角度的DOA，可以改为三个信号，同时需要把子程序中的输出改成三个即可。-music static DOA, classical algorithm, with detailed notes, suitable for learning. Run directly, the DOA of two angles can be changed to three signals, at the same time need to change the output of the subroutine three can.