网络编码多址接入下行链路系统中的功率多样化多用户框架

Power Diversified Multi-User Framework in Network Coded Multiple Access Downlink Systems

本文是在网络编码多址(NCMA)系统中设计功率多样化多用户架构的第一次尝试,称为PD-NCMA。文中提出了一种适用于多个(3个以上)设备的NCMA下行链路中的两阶段动态框架。基于发送内容的消息级别,在第一阶段动态地解决以内容为中心的聚类,在第二阶段实现每个集群中的功率分配,确保更高内容级别的设备的服务质量。数值结果证明了PD-NCMA的可行性,PD-NCMA的吞吐量明显优于传统的NCMA系统。

This aericle is the first attempt to design power-diverse multiuser architecture in network-coded multiple access(NCMA)system,referred to as PD-NCMA.In particular,a two-stage dynamic framework in NCMA downlink,which is suitable for multiple(more than three)devices,is proposed.Based on the message levels of the content being sent,content-centric clustering is solved dynamically at first stage.And the power allocation in each cluster is realized in second stage to ensure the quality of service for devices with higher content levels.Numerical results demonstrate the feasibility of PD-NCMA and the throughput of PD-NCMA significantly outperforms the traditional NCMA system.