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Open Access
MIMO-OFDM Precoding Technique for Minimizing BER Upper Bound of MLD

Boonsarn PITAKDUMRONGKIJA, Kazuhiko FUKAWA, Hiroshi SUZUKI, Takashi HAGIWARA

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Summary :

This paper proposes a new MIMO-OFDM precoding technique that aims to minimize a bit error rate (BER) upper bound of the maximum likelihood detection (MLD) in mobile radio communications. Using a steepest descent algorithm, the proposed method estimates linear precoding matrices that can minimize the upper bound of BER under power constraints. Since the upper bound is derived from all the pairwise error probabilities, this method can effectively optimize overall Euclidean distances between signals received by multiple antennas and their replicas. Computer simulations evaluate the BER performance and channel capacity of the proposed scheme for 22 and 44 MIMO-OFDM systems with BPSK, QPSK, and 16 QAM. It is demonstrated that the proposed precoding technique is superior in terms of average BER to conventional precoding methods including a precoder which maximizes only the minimum Euclidean distance as the worst case.

Publication
IEICE TRANSACTIONS on Communications Vol.E91-B No.7 pp.2287-2298
Publication Date
2008/07/01
Publicized
Online ISSN
1745-1345
DOI
10.1093/ietcom/e91-b.7.2287
Type of Manuscript
PAPER
Category
Wireless Communication Technologies

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