Abstract: This paper discusses the recoverability of underdetermined blind source separation(BSS),based on a two-stage sparse representation approach.Within the stochastic framework blind source separation it is usually predicted that source signals are sufficiently sparse.This paper estimates recoverability probability when source signals are not sufficiently sparse,which not only reflects the relationship between the recoverability and sparseness of sources but also indicates the effectiveness of the tw...

Key words: underdetermined mixture； blind source separation； sparse representation； recoverability；