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 c