WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 11, 2015
A Novel Approach to Eliminating the Permutation and Scaling Indeterminacies of Block BSS
Authors: , , , , ,
Abstract: This paper considers the permutation and scaling indeterminacy problem of blind source separation (BSS) in the case that the continuously mixing signals are split in time and processed block by block. When tying the separated signals in each time block, the recovered whole signals differ from the original sources up to permutation and scaling indeterminacies. Inspired by previous Permutation Method of reconstructing source signals in time domain, a novel approach is proposed to eliminate the inherent permutation and scaling indeterminacies when the block BSS is considered. This new method reformulates the mixing signals by overlapping adjacent signal blocks partially and utilizes the dependent correlation of the overlapping signals in each adjacent block to adjust the permutation and scaling parameters. Compared with the Permutation Method, this new method is more efficient in terms of separation quality and is much quicker in terms of execution speed. The performance of this novel approach is confirmed by computer simulations and realistic experiments performed on wireless communication system.
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Keywords: blind source separation, independent component analysis, permutation and scaling indeterminacies, adjacent time blocks, overlapping signals, permutation method
Pages: 131-139
WSEAS Transactions on Signal Processing, ISSN / E-ISSN: 1790-5052 / 2224-3488, Volume 11, 2015, Art. #16