대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2002년도 ITC-CSCC -2
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- Pages.1066-1069
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- 2002
Performance Improvement of OFDM System Using Transmit Diversity with Space-Time Block Coding
- Yorwittaya, N. (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology) ;
- Chamchoy, M. (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology) ;
- Supanakoon, P. (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology) ;
- Tangtisanon, P. (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology)
- 발행 : 2002.07.01
초록
Orthogonal frequency division multiplexing (OFDM) is a special technique for communication systems which can support the high data rate transmission with sufficient robustness to fading channels. Tansmitter diversity with space-time block coding (STBC) is an attractive transmission scheme to improve the performance of systems. In this paper, we compare the performance of space-time block coded OFDM systems with that of conventional OFDM systems over fast fading channels. The block-interleaved (BI) STBC and frequency hopping (FH) OFDM are proposed in the study to provide the maximum achievable diversity gains. As the simulation results, the STBC OFDM, Bl-STBC OFDM and Bl-STBC FH-OFDM provide the much improved performance over the conventional OFDM. And the Bl-STBC FH-OFDM also provide the better performance than the STBC OFDM and Bl-STBC OFDM, especially, in the case of the two transmit antennas are employed while BI-STBC FH-OFDM can maintain the same data rate of 12 Mbps.
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