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arXiv 1509.03085cs.ITmath.IT
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带噪声反馈的AWGN信道的交互方案

Interactive Schemes for the AWGN Channel with Noisy Feedback

Assaf Ben-Yishai, Ofer Shayevitz

摘要:

本文研究了加性高斯白噪声(AWGN)信道中的通信问题。当反馈信道无噪声时,经典的Schalkwijk-Kailath(S-K)方案已知以简单的顺序方式实现容量,同时获得优于非反馈方案的可靠性。在这项工作中,我们展示了如何简单和可靠性,即使当反馈是嘈杂的,只要反馈通道是足够好的前馈通道。具体来说,我们引入了一个低复杂度低延迟的互动计划,接近容量的一个固定的比特错误概率(例如$10^{-6}$)。然后,我们建立在这个计划提供两个渐进的建设,一个基于高维格,和其他级联编码的基础上,承认一个错误指数显着超过最好的可能的非反馈指数。我们的方法是基于解释反馈传输作为一个边信息的问题,并采用了交互式模格的解决方案。

英文摘要:

We study the problem of communication over an additive white Gaussian noise (AWGN) channel with an AWGN feedback channel. When the feedback channel is noiseless, the classic Schalkwijk-Kailath (S-K) scheme is known to achieve capacity in a simple sequential fashion, while attaining reliability superior to non-feedback schemes. In this work, we show how simplicity and reliability can be attained even when the feedback is noisy, provided that the feedback channel is sufficiently better than the feedforward channel. Specifically, we introduce a low-complexity low-delay interactive scheme that operates close to capacity for a fixed bit error probability (e.g. $10^{-6}$). We then build on this scheme to provide two asymptotic constructions, one based on high dimensional lattices, and the other based on concatenated coding, that admit an error exponent significantly exceeding the best possible non-feedback exponent. Our approach is based on the interpretation of feedback transmission as a side-information problem, and employs an interactive modulo-lattice solution.

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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