Blind source separation with dynamic source number using adaptive neural algorithm

Authors:
Tsung-Ying Sun;Chan-Cheng Liu;Shang-Jeng Tsai;Sheng-Ta Hsieh
Affiliations:
Department of Electrical Engineering, National Dong Hwa University, 97401 Hualien, Taiwan, ROC;Department of Electrical Engineering, National Dong Hwa University, 97401 Hualien, Taiwan, ROC;Department of Electrical Engineering, National Dong Hwa University, 97401 Hualien, Taiwan, ROC;Department of Electrical Engineering, Oriental Institute of Technology, 220 Taipei County, Taiwan, ROC
Venue:
Expert Systems with Applications: An International Journal
Year:
2009

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Abstract

A difficult blind source separation (BSS) issue dealing with an unknown and dynamic number of sources is tackled in this study. In the past, the majority of BSS algorithms familiarize themselves with situations where the numbers of sources are given, because the settings for the dimensions of the algorithm are dependent on this information. However, such an assumption could not be held in many advanced applications. Thus, this paper proposes the adaptive neural algorithm (ANA) which designs and associates several auto-adjust mechanisms to challenge these advanced BSS problems. The first implementation is the on-line estimator of source numbers improved from the cross-validation technique. The second is the adaptive structure neural network that combines feed-forward architecture and the self-organized criterion. The last is the learning rate adjustment in order to enhance efficiency of learning. The validity and performance of the proposed algorithm are demonstrated by computer simulations, and are compared to algorithms with state of the art. From the simulation results, these have been confirmed that the proposed ANA performed better separation than others in static BSS cases and is feasible for dynamic BSS cases.