On the Distortion Exponents of Layered Broadcast Transmission in Multi-Relay Cooperative Networks
IEEE Transactions on Signal Processing（2010）
摘要
In this paper, we consider the transmission of a Gaussian source over a cooperative relay network, and analyze its end-to-end distortion at high signal-to-noise ratio, in terms of the distortion exponent. Our contributions are threefold. First, we extend the existing distortion exponent analyses to cooperative networks with an arbitrary number of relays. Second, we derive the distortion exponents when the layered source coding with broadcast transmission strategy is used in multi-relay networks under three cooperation protocols, based on repetition, relay selection, and space-time coding, respectively. Our analyses reveal the impacts of the number of relays, bandwidth ratio and cooperation protocol on the distortion exponent. Third, we prove the successive refinability of the diversity-multiplexing tradeoffs of the three multi-relay cooperation protocols.
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关键词
end-to-end distortion,bandwidth ratio,cooperative communications,multi-relay cooperative network,broadcast transmission strategy,broadcast channels,relays,layered broadcast transmission,space-time coding,diversity-multiplexing tradeoff,arbitrary number,cooperative network,distortion exponent,multirelay cooperation protocol,multi-access systems,gaussian source transmission,multi-relay cooperation protocol,wireless channels,source coding,gaussian processes,multirelay cooperative networks,existing distortion exponent analysis,cooperation protocol,multicast protocols,space-time codes,relay channel,gaussian source,signal-to-noise ratio,signal to noise ratio,encoding,distortion,protocols,fading,space time code,mimo,source code,space time coding
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