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English Performance of MIMO-OFDM Combing Bemaformer with Space-time Decoder in Multiuser Environments  

Kim Chan-Kyu (한밭대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.8A, 2006 , pp. 775-783 More about this Journal
Abstract
In this paper, the new technique combining beamforming with space-time coding is proposed for an orthogonal frequency division multiplexing(OFDM) system with multi-input multi-output(MIMO). When MIMO-OFDM system is employing Nt(the number of transmitterantenna) beamfomers and one S-T decoder at Nr receiver antennas, Nt signals removed CCI are outputted at the beamformer and then diversity gain can be got through space-time decoding. As the proposed technique can reduce cochannel interference and get diversity gain in the multi-user environment, the performance of MIMO-OFDM system is very improved. BER performance improvement and convergence behavior of the proposed approach are investigated through computer simulation by applying it to MIMO-OFDM system in the multi-user environment.
Keywords
MIMO; OFDM; Space-time decoder; beamforming; LMS;
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