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arXiv 1311.0100cs.ITmath.IT
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一种适用于离散无记忆信道的低误码率反馈编码方案

An Efficient Feedback Coding Scheme with Low Error Probability for Discrete Memoryless Channels

Cheuk Ting Li, Abbas El Gamal

摘要:

现有的固定长度反馈通信方案或者专用于特定信道(Schalkwijk-Kailath,Horstein),或者应用于一般信道,但是具有高编码复杂性(块反馈方案)或者难以分析(后验匹配)。本文提出了一种新的定长反馈编码方案,该方案在所有离散无记忆信道上都能达到容量,当速率接近容量时,误差指数接近球形填充界,并且具有$O(n\log n)$编码复杂度。这些好处是通过明智地结合从以前的计划与新的随机化技术和编码/解码规则的功能。这些新特征使得新方案的错误概率分析比后验匹配更容易。

英文摘要:

Existing fixed-length feedback communication schemes are either specialized to particular channels (Schalkwijk--Kailath, Horstein), or apply to general channels but either have high coding complexity (block feedback schemes) or are difficult to analyze (posterior matching). This paper introduces a new fixed-length feedback coding scheme which achieves the capacity for all discrete memoryless channels, has an error exponent that approaches the sphere packing bound as the rate approaches the capacity, and has $O(n\log n)$ coding complexity. These benefits are achieved by judiciously combining features from previous schemes with new randomization technique and encoding/decoding rule. These new features make the analysis of the error probability for the new scheme easier than for posterior matching.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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