关键词: 协方差, 子空间, 对角占优, 数据有效率

Abstract:

In order to solve the problem that is difficult to identify the faint modal with subspace algorithm driven by covariance, an improvement was put forward which chosen the data according to data efficient ratio. The method applied data efficient ratio to choose the data from tests, which could improve the auto-correlation energy proportion in the covariance matrix piece to realize the identification of faint modal. The simulation was carried out to verify the method, which proves the method is effective. The results show that the method can improve the identification quality effectively.

Key words: covariance, subspace, diagonal dominate, data efficient ratio