Fronthaul-aware superposition coding for noncoherent transmission in C-RAN downlink

被引：0
作者：
Seok-Hwan Park
Changick Song
机构：
[1] Chonbuk National University,Division of Electronic Engineering
[2] Korea National University of Transportation,Department of Information and Communications Engineering
来源：
Annals of Telecommunications | 2017年 / 72卷
关键词：
Cloud radio access network; Constrained fronthaul; Noncoherent transmission; Superposition coding;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Cloud radio access network (C-RAN) has arisen as a promising architecture for the 5G wireless communication system. Among many advantages, C-RAN is known to enable large-scale interference management by migrating baseband processing functionalities from radio units (RUs) to a control unit (CU) with the aid of fronthaul links. Most of literatures prescribe that perfect synchronization is available among distributed RUs and fronthaul links are equipped with infinite capacities. Since these assumptions are far from practical situations, this work proposes a more practical noncoherent transmission strategy, in which synchronization is not needed among the RUs, by means of a novel superposition, or broadcast, coding. Under the proposed superposition coding scheme, the problem of maximizing the weighted sum of per-user achievable rates is tackled while satisfying per-RU transmit power and fronthaul capacity constraints. Some numerical results are provided to validate the effectiveness of the proposed scheme.
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页码：661 / 667
页数：6
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