A hierarchical approach for sparse source Blind Signal Separation problem

A hierarchical approach for sparse source Blind Signal Separation problem

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Article ID: iaor2014962
Volume: 41
Issue: 6
Start Page Number: 386
End Page Number: 398
Publication Date: Jan 2014
Journal: Computers and Operations Research
Authors: , ,
Keywords: hierarchical structure
Abstract:

In this paper, a Blind Signal Separation (BSS) problem is considered: given X R m × N equ1, BSS problem is to find A R m × n equ2 and S R n × N equ3, where the matrices are related as X=AS. We have reviewed the sufficient conditions on the structure of X, A and S in terms of sparseness conditions on S, such that the equation X = AS equ4 can be solved uniquely (up to permutation and scalability). A hierarchical 0–1 MIP is proposed to solve the problem. Probabilistically, we have shown that every subsequent level of hierarchical MIP will be easier to solve than the precedent level of MIP. Moreover, we have presented case studies that illustrate the performance of proposed solution approach for correlated sparse sources.

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