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Research on cooperative ARQ for two-hop and two-relay system

Keywords: relay,cooperative communication,ARQ,bit error ratio,performance comparison

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The paper proposed a new transmission scheme in cooperative communication system based on best relay selection: cooperative ARQ scheme for two-hop and two-relay. The scheme was a tradeoff between transmission delay and efficiency. The analysis of theory and simulation results show that, under time correlated Rayleigh fading channel, cooperative ARQ scheme for two-hop and two-relay can give the best performance gain compared with single relay cooperative ARQ system and two relay cooperative system, not only when the qualities of source and relay are good, but also when there is a bad fading in the link of source to relay.


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