Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TF1
Session:
Number:3TF1-4
Experimental Study on Blind MIMO Transmission by using ICA
Kohei Sugai, Hiroyoshi Yamada, Kentaro Nishimori, Yoshio Yamaguchi,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
In the MIMO system, transmitted streams are multiplexed spatially at the same frequency. This causes inter-stream interference at the receiver. Therefore, equalization/decoding method is necessary. Least Squares Channel Estimation (LSCE)[1] is often used as the method. However, overhead of throughput due to training symbols is a problem for effective transmission. In this report, we employ Independent Component Analysis (ICA) [2] as a blind method without the training symbols. We have reported effectiveness of the ICA with a small number of training symbols compared with that of the LSCE [3]. These training symbols is just used for phase correction of each stream, not for channel estimation. However, since the ICA is a statistical channel estimation method, many data symbols are often needed. In this report, we propose to apply a pre-filtering processing scheme to the transmitting signals to obtain better performance compared with the conventional ICA. Computer simulation results are shown to demonstrate availability of the method. Furthermore we provide indoor experimental results to verify the effectiveness of the method in the real environment.