Blind signal separable manner and the record media which records the device, the blind signal separation program and that program

摘要

P To highly accurately solve a permutation of blind signal separation by combining a solution of permutation by the arrival direction of a signal and a solution of permutation by the similarity of a separated signal. PSOLUTION: When the permutation is solved after (s1) performing short time Fourier transformation of an observation signal, (s2) finding separation matrixes at each frequency by independent component analysis, (s3) estimating arrival directions of signals extracted from each row of the separation matrixes at each frequency, (s4) judging whether the estimated values are reliable enough, (s5) calculating similarities of separated signals between frequencies and (s6) finding separation matrixes at each frequency, a permutation is determined by making uniform the arrival directions of the signals at frequencies at which it is judged the estimation of the arrival directions are reliable enough and or a permutation is so determined at other frequencies that similarities of the separated signals to nearby frequencies increase. PCOPYRIGHT: (C)2004 and JPO