Decision of tap numbers in blind signal separation for acoustic signals

摘要

Towards an application of blind signal separation there is a problem that it is necessary to decide on the taps number of taps of a separation filter again experimentally whenever environment changes. In order to solve this problem, in this paper, the decision of the tap numbers automatically according to an environmental change was proposed. The proposed method assumes the non-minimum phase system between the source of signals, and sensors. And the number of taps is decided by observing the conditions which the filter proposed by Kawamoto et al. fills in the non-minimum phase system. To evaluate the effectiveness, the simulation is performed. As the result, it is shown that change of the number of taps when environment changes, the observation signals can be separated with the presumed filter.