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http://dx.doi.org/10.7840/KICS.2011.36A.7.640

Relay Selection Schemes Using STBC Technique in OFDM-Based Cooperative Wireless Communications  

Lee, Je-Yeon ((주)이노와이어리스)
Yang, Mo-Chan (숭실대학교)
Yoo, Sung-Cheol (숭실대학교)
Shin, Yo-An (숭실대학교)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.7A, 2011 , pp. 640-648 More about this Journal
Abstract
We propose relay selection schemes using STBC (Space Time Block Coding) technique in OFDM (Orthogonal Frequency Division Multiplexing)-based wireless systems. The proposed schemes select the optimum relay having the maximum instantaneous equivalent channel gain among multiple candidate relays. Also, in order to reduce the system overhead, a symbol grouping method which groups some amount of symbols before selecting the optimum relay is proposed. The simulation results show that the proposed relay selection schemes can obtain more selection diversity gain as the number of selectable relay candidates increases. Furthermore, the proposed scheme with the symbol grouping can reduce system overhead without any degradation of the performance in fading channels with low frequency selectivity.
Keywords
Cooperative communication; OFDM; Relay Selection; STBC; Symbol Grouping;
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