Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2011, Vol. 34 ›› Issue (s1): 59-62.doi: 10.13190/jbupt.2011s1.59.huzw

• Papers • Previous Articles     Next Articles

An Improved Scheme of Distributed SpaceTime Coding Based on GABBA Codes

    

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  • Online:2011-10-28 Published:2011-10-28
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Abstract:

Aim at the problem that the channel state information (CSI) is not taken full advantage in traditional distributed generalized ABBA (GABBA) spacetime codes in amplifyandforward relay networks, an improved scheme is proposed. In this scheme, the receiver calculates and sends out the current feedback information according to the CSI. After receiving the feedback information at one of the relay nodes, some preprocess is used on the original signal of this branch. The scheme can alleviate the interference brought by channel dependence, and improve reliability of the system. Analysis and simulation result suggest that the proposed scheme can significantly decrease the system bit error rate in contrast with the former scheme at the cost of one bit feedback information.

Key words: relay networks, distributed spacetime codes, feedback, generalized ABBA codes

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