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http://dx.doi.org/10.7840/kics.2012.37A.9.721

Multi-Cell Transmit Diversity Scheme for OFDMA Systems  

Seo, Bangwon (한국전자통신연구원 차세대통신연구부문 이동통신방식연구팀)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.9, 2012 , pp. 721-727 More about this Journal
Abstract
Since a conventional multi-cell transmit diversity scheme depends on the feedback from the user for the channel gain information, its performance gets to severely degrade when the channel varies fast due to the high mobility of the user. Also, transmit power of the base station cannot be fully used in the conventional scheme because only one transmit antenna is used for data transmission. In this paper, we propose a multi-cell transmit diversity scheme appropriate for fast fading channel. In the proposed scheme, channel-independent precoding vector is applied over all transmit antennas and different precoding vectors are applied for neighboring subcarriers so that the received signal is avoided to experience deep fading over multiple neighboring subcarriers. Simulation results show that the proposed scheme has better detector output signal-to-noise ratio (SNR) and bit error rate (BER) performances than the conventional scheme.
Keywords
MIMO; STBC;
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Times Cited By KSCI : 1  (Citation Analysis)
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