用于计算待测信号的功率谱密度，方法是通过计算自相关函数的傅立叶变换。-Used to calculate the power spectral density of the test signal, the method by calculating the autocorrelation function of the Fourier transform.

spectrum.music对象和pmusic函数提供Schmidt提出的MUSIC算法。该算法基于对自相关矩阵的特征分析，用于对频谱的估计。这种谱分析将数据相关矩阵的信息分为信号子空间和噪声子空间。-spectrum.music objects and functions provide MUSIC algorithm pmusic Schmidt raised. The algorithm is based on the correlation matrix of the feature a