A probability-based combination method for unsupervised clustering with application to blind source separation

Authors:
Julian Mathias Becker;Martin Spiertz;Volker Gnann
Affiliations:
Institut für Nachrichtentechnik, RWTH Aachen University, Aachen, Germany;Institut für Nachrichtentechnik, RWTH Aachen University, Aachen, Germany;Institut für Nachrichtentechnik, RWTH Aachen University, Aachen, Germany
Venue:
LVA/ICA'12 Proceedings of the 10th international conference on Latent Variable Analysis and Signal Separation
Year:
2012

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Abstract

Unsupervised clustering algorithms can be combined to improve the robustness and the quality of the results, e.g. in blind source separation. Before combining the results of these clustering methods the corresponding clusters have to be aligned, but usually it is not known which clusters of the employed methods correspond to each other. In this paper, we present a method to avoid this correspondence problem using probability theory. We also present an application of our method in blind source separation. Our approach is better expandable than other state-of-the-art separation algorithms while leading to slightly better results.