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Precoding for MIMO-broadcast channels with joint linear transmitter and receiver design

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3 Author(s)
Wei Wang ; DOCOMO Beijing Commun. Labs. Co. Ltd., Beijing, China ; Zhan Zhang ; Hidetoshi Kayama

The transmitter side precoding shows excellent performance for multiuser multiple input multiple output (MIMO) wireless systems. However, joint transmitter and receiver design might achieve further improvement. The optimum precoding and decoding matrices can be solved iteratively. In this paper, we propose a modified joint iterative algorithm, based on minimum mean square error (MMSE) criterion in both transmitter and receiver sides. The proposed method makes better use of the channel information and has faster convergence speed than existing methods. Moreover, it uses a regularization factor to replace the Lagrange multiplier used in existing methods, which makes the calculation procedure simpler. Simulations demonstrate the advantages of the proposed algorithm.

Published in:

Wireless Communication Systems. 2008. ISWCS '08. IEEE International Symposium on

Date of Conference:

21-24 Oct. 2008