说明：  MUSIC测向经典MUSIC算法是根据窄带数据模型以几何观点考察信号参数估计的问题。它是最早的也是最经典的超分辨DOA估计方法，它利用了信号子空间和噪声子空间的正交性，构造空间谱函数，通过谱峰搜索，检测信号的DOA。
(The MUSIC direction-finding classical MUSIC algorithm is based on a narrow-band data model to examine the problem of signal parameter estimation from a geometric point of view. It is the earliest and most classical method for super-resolution DOA estimation. It uses the orthogonality of the signal subspace and the noise subspace, constructs a spatial spectral function, and searches for the DOA of the signal through spectral peak search.)