Introduction - If you have any usage issues, please Google them yourself
MUSIC algorithm is a kind of feature space based on the matrix decomposition method.From geometric point of view, the signal processing of the observation space can be decomposed into signal subspace and noise subspace, obviously the two space are orthogonal.Signal subspace by array covariance matrix of the received data and signal of the corresponding eigenvectors, the noise subspace by the covariance matrix of all minimum eigenvalue (noise variance) of the corresponding eigenvectors.