A direct solution for blind separation of sources
نویسندگان
چکیده
منابع مشابه
A direct solution for blind separation of sources
The paper proposes a direct estimation of the mixing matrix and not a tuning of the separation matrix as usually done. The method is based on resolution of a set of 8 equations involving cumulants up to order 4 of the mixture signals, which may be reduce to resolution to a second order polynomial equation. Experimental results and robustness suggest to use the method as a preliminary step to pr...
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The separation of unobserved sources from mixed observed data is a fundamental signal processing problem. Most of the proposed techniques for solving this problem rely on independence or at least uncorrelation assumption for source signals. This paper introduces a technique for cases that source signals are correlated with each other. The method uses Wold decomposition principle for extracting ...
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A well-known fact in blind deconvolution is that if the unknown source signal is white (temporally) and the unknown channel filter is minimum phase, it is possible to determine the inverse filter (equalizer) by evaluating simply the power spectral density (PSD) of the received signal. For blind source separation, however, a similar special case, equivalent to the situation in blind deconvolutio...
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In the problem of blind separation of sources, we define usually a function ( cost, contrast, . . . ) and the solution is based on the search of the extremum of that function. The choice of cost function is then very important, both to have simple computation and to guarantee unicity and convergence to a good solution. In this paper, in the case of instantaneous mixtures of 2 sources, we study ...
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The problem of blind separation of sources is generally solved by using statistical criteria, minimization of contrast function [2], [8], cancelation or minimization of a cost functions [6], [5], [4], [3]. However, using prior knowledge on the sources, new algorithms, basically simpler and more e cient, may be derived [9], [1], [7]. In this paper, assuming that sources have bounded probability ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 1996
ISSN: 1053-587X
DOI: 10.1109/78.489054