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Rate-adaptive transmission over correlated fading channels

机译：相关衰落信道上的速率自适应传输

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摘要

In this paper, we investigate link adaptation and incremental redundancy (IR) retransmission schemes over correlated wireless channels. While computer simulations have been used to study the performance of these techniques, a numerically tractable analytical approach is more desirable to analyze generic protocols, and to reveal insights into the performance tradeoffs. An error-recursion approach is developed in this paper to mathematically analyze the throughput, delay, and energy efficiency of rate-adaptation techniques over fading channels with arbitrary correlations between retransmissions. Using Reed-Solomon codes as an example, we quantitatively predict the performance tradeoff of throughput and latency for IR schemes and the performance dependency on the channel correlation. Numerical results also show that reactive rate-adaptation schemes with IR retransmission outperform proactive rate-adaptive schemes, even with perfect channel side information, in terms of throughput and energy efficiency.
机译：在本文中，我们研究了相关无线信道上的链路自适应和增量冗余（IR）重传方案。尽管已经使用计算机仿真来研究这些技术的性能，但更希望采用一种数值上易于处理的分析方法来分析通用协议并揭示对性能折衷的见解。本文提出了一种错误递归方法，以数学方式分析衰落信道上码率自适应技术的吞吐量，延迟和能效，并在重传之间具有任意相关性。以Reed-Solomon码为例，我们定量地预测了IR方案的吞吐量和等待时间的性能折衷以及对信道相关性的性能依赖性。数值结果还表明，即使在具有完善的信道辅助信息的情况下，具有红外重传的无功速率自适应方案在吞吐量和能量效率方面也优于主动速率自适应方案。

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