云无线接入网络的低复杂度编码技术

Nadim Ghaddar;Lele Wang
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引用次数: 0

摘要

本文研究了具有 K 个用户和 L 个中继站的云无线接入网(C-RAN)的上下行链路编码问题。研究表明,可以从最多 $4(K+L)-2$ 为对称信道设计的点对点编码开始,构建低复杂度编码方案,以实现联合编码和压缩的速率-链路区域内的任意点。这就把为 C-RAN 构建良好编码这一看似艰巨的任务简化为为单用户信道寻找良好编码这一更好理解的任务。为了证明这一结果,我们建立了联合编码和连续编码的可实现速率-频带区域之间的等价关系。然后,利用速率拆分和量化拆分技术来说明,在联合编码区域实现速率-频带点的任务可以简化为在高维 C-RAN 问题中实现角点的任务。作为副产品,还得出了上行链路 C-RAN 联合解码区域的一些有趣特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Low-Complexity Coding Techniques for Cloud Radio Access Networks
The problem of coding for the uplink and downlink of cloud radio access networks (C-RAN’s) with K users and L relays is considered. It is shown that low-complexity coding schemes that achieve any point in the rate-fronthaul region of joint coding and compression can be constructed starting from at most $4(K+L)-2$ point-to-point codes designed for symmetric channels. This reduces the seemingly hard task of constructing good codes for C-RAN’s to the much better understood task of finding good codes for single-user channels. To show this result, an equivalence between the achievable rate-fronthaul regions of joint coding and successive coding is established. Then, rate-splitting and quantization-splitting techniques are used to show that the task of achieving a rate-fronthaul point in the joint coding region can be simplified to that of achieving a corner point in a higher-dimensional C-RAN problem. As a by-product, some interesting properties of the rate-fronthaul region of joint decoding for uplink C-RAN’s are also derived.
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CiteScore
8.20
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