Randomized space-time block coding with limited feedback

Authors:
Xin He;Tao Luo;Jianfeng Li;Guangxin Yue;Hao Zhao
Affiliations:
Beijing University of Posts and Telecommunications Beijing, P.R. China;Beijing University of Posts and Telecommunications Beijing, P.R. China;Beijing University of Posts and Telecommunications Beijing, P.R. China;Beijing University of Posts and Telecommunications Beijing, P.R. China;Beijing University of Posts and Telecommunications Beijing, P.R. China
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

Citing 5
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Abstract

In this paper, a decode-and-forward (DF) cooperative diversity scheme is considered for dynamic relay networks, where each node is equipped with a single antenna. A randomized space-time block coding (STBC) cooperative relaying scheme has been proposed to get spatial diversity gains without centralized control information. However, it can not get maximum diversity gain when the number of active relay nodes is small. In this paper, we propose a limited feedback scheme to improve the bit error rate (BER) performance of the randomized STBC scheme. Simulation results reveal that the proposed feedback scheme can achieve almost the same BER performance as the centralized STBC scheme in some channel conditions. In addition, it does not degrade the performance of the randomized STBC scheme even with a large feedback delay.