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IEICE Transactions on Communications 2005 E88-B(11):4246-4249; doi:10.1093/ietcom/e88-b.11.4246
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Copyright © 2005 The Institute of Electronics, Information and Communication Engineers

Special Section on Software Defined Radio Technology and Its Applications -- Letter

ICA-Based Separation and DOA Estimation of Analog Modulated Signals in Multipath Environment

Kunihiko YOKOI1 and Nozomu HAMADA1

1 The authors are with Signal Processing Lab., School of Integrated Design Engineering, Keio University, Yokohama-shi, 223-8522 Japan. E-mail: yokoi{at}hamada.sd.keio.ac.jp, E-mail: hamada{at}sd.keio.ac.jp

The blind separation problem of analog modulated radio signals and their DOA (Direction Of Arrival) estimation problem are considered. These problems are very important in radio surveillance. Based on the idea of Carlos and Takada [1], the following two methods are proposed for an Independent Component Analysis (ICA) based radio surveillance system. The first method is concerned with the improvement of DOA estimation accuracy after signal separation by ICA. Another method treats separation and DOA estimation in multipath environment. The effectiveness of the proposed methods is proved by computer simulation.

Key Words: radio surveillance, multipafh, ICA, DOA estimation

Manuscript received February 23, 2005. Manuscript revised May 29, 2005.


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