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Effective Learning Rate Adjustment of Blind Source Separation Based on an Improved Particle Swarm Optimizer

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4 Author(s)

Blind source separation (BSS) is a technique used to recover a set of source signals without prior information on the transformation matrix or the probability distributions of the source signals. In previous works on BSS, the choice of the learning rate would result in a competition between stability and speed of convergence. In this paper, a particle swarm optimization (PSO)-based learning rate adjustment method is proposed for BSS, and a simple decision-making method is introduced for how the learning rate should be applied in the current time slot. In the experiments, samples of four and ten source signals were mixed and separated and the results were compared with other related approaches. The proposed approach exhibits rapid convergence, and produces more efficient and more stable independent component analysis algorithms, than other related approaches.

Published in:

Evolutionary Computation, IEEE Transactions on  (Volume:12 ,  Issue: 2 )

Date of Publication:

April 2008

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