基于功率域非正交多址接入的协作中继网络技术研究

Non-orthogonal multiple access is an important research field in the next generation mobile communication networks. The power domain non-orthogonal multiple access (PD-NOMA) can improve spectrum efficiency, cooperative relaying network can enhance transmission reliability. Since the restriction of overhead and channel instantaneous variation, it is challengeable to apply PD-NOMA scheme into practical cooperative relaying networks. This research proposal focus on the objects of PD-NOMA scheme and cooperative relaying networks, which is under the condition of perfect or imperfect channel state information. Based on these conditions, this research proposal plans to use the mathematical tool of probability theory, game theory, random matrix theory to study the key technology of cooperative relaying network with PD-NOMA, such as power allocation scheme, relay selection scheme, unicast- multicast transmission scheme etc. This research proposal expects to achieve the target that cooperative relaying network with PD-NOMA can simultaneously improve the network transmission of efficiency and reliability. The research results can not only enrich the theoretical results of PD-NOMA and cooperative relaying network, but also provide a new research idea and theoretical support for applying PD-NOMA into cooperative relaying network.

非正交多址接入是下一代移动通信网络重要的研究方向之一。功率域非正交多址接入(PD-NOMA)可提升频谱效率，协作中继网络可提高传输可靠性。由于受到系统开销和信道瞬时变化的限制，在实际的协作中继网络中应用PD-NOMA准则还存在很大的挑战。本课题以PD-NOMA准则和协作中继网络为研究对象，拟采用概率论、博弈论、随机矩阵理论等数学工具探索在完备或非完备信道状态信息条件下PD-NOMA协作中继网络的关键技术：功率分配方案、中继选择方案、单播-多播传输方案等。本课题预期达到PD-NOMA协作中继网络同时提高网络传输有效性和可靠性的目标。研究成果不仅能丰富PD-NOMA和协作中继网络的理论结果，而且将为PD-NOMA准则在实际协作中继网络的应用提供新的研究思路和理论支撑。

随着智能终端的普及应用和移动新业务需求持续增长，无线传输速率需求呈指数增长，无线通信的传输速率仍然难以满足未来移动通信的应用需求。本课题利用中继协议或多中继的特性使得功率域非正交多址接入准则能够进一步提高频谱效率和用户公平性。本项目根据实际无线通信网络发射机获得完备的信道信息比较困难，进而网络中用户的公平性难以得到保证。主要研究：1)基于非正交多址接入协作中继网络的功率分配研究；2)基于非正交多址接入协作多中继网络的中继选择方案研究；3)基于非正交多址接入协作多中继网络的单播-多播传输。本课题按照预定的计划开展研究，共申请专利1个，发表学术论文16篇。课题组的代表性成果包括：1)协作非正交多址接入网络的两级中继选择方案；2)基于单播-多播传输的非正交多址接入网络的功率分配方案；3)基于瞬时无线信息和功率传输的协作非正交多址接入网络的能效优化；4)基于缓存的协作非正交多址接入网络的性能分析与优化。本课题的研究成果将进一步推动非正交多址接入技术在无线通信协作中继网络的应用，为第五代移动通信网络的部署和规划提供了理论和技术支撑。