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Signal modulus design for blind source separation via algebraic known modulus algorithm: A perturbation perspective

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4 Author(s)
Jwo-Yuh Wu ; Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu ; Wen-Fang Yang ; Li-Chun Wang ; Ta-Sung Lee

This brief considers blind signal source separation via algebraic known modulus algorithm. It is shown that through proper signal modulus design the estimation accuracy of the beamforming vector, as well as the performance of signal separation, can be improved. Specifically, based on a matrix perturbation analysis we propose a criterion, in the form of minimizing the maximal singular value of the modulus code matrix, for enhancing robustness of the beamforming vector against measurement noise. A closed-form solution is then derived and its performance is tested through numerical simulation.

Published in:

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Date of Conference:

18-21 May 2008

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