Performance analysis of the fastica algorithm in ICA-based co-channel communication system

Authors:
Xiaoniu Yang;Junliang Yao;Jiandong Li;Zhao Li
Affiliations:
Research Institute of CETC, Jiaxing, Zhejiang, China;Research Institute of CETC, Jiaxing, Zhejiang, China and State Key Lab. of Integrated Service Networks, Xidian University, Xi'an, China;State Key Lab. of Integrated Service Networks, Xidian University, Xi'an, China;State Key Lab. of Integrated Service Networks, Xidian University, Xi'an, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

This paper analyzes the performance of FastICA algorithm when applied to noisy co-channel communication system. Firstly, we propose a model of ICA-based communication system, which adopts the FastICA algorithm to separate co-channel signals. In order to facilitate the analysis we first decompose the noise into two complementary subspaces, and get a new form of original signal through pre-whitening. Based on the analysis result above we obtain the analytic closed-form expressions of global separating matrix. Finally, a capacity index is brought forward to confirm the validity of our analysis and show the performance of ICA-based communication system. Some computer simulations that support the theoretical analysis are also included.