高谱效全/半双工混合通信网络连续中继协议设计与性能分析

项目名称： 高谱效全/半双工混合通信网络连续中继协议设计与性能分析

项目编号： No.61501383

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李里

作者单位： 西南交通大学

项目金额： 21万元

中文摘要： 以同时同频全双工通信为关键采纳技术之一的5G网络即将来临，而现有的大量半双工无线通信设备也不会立即消失，我们必将长期面临全/半双工混合网络这一特殊通信场景。因此传统协作通信技术如何有效适用于此种新的应用场景就成为了一个亟需解决的问题。针对这一难题，本项目旨在：1）依据连续中继技术可依靠一对普通半双工中继节点互相合作共同模拟一个虚拟全双工中继节点的特点，设计一种能适用于全/半双工混合网络的全新连续中继协议，从而完成连续中继技术在全双工网络环境下的首次成功应用；2）通过分析所提系统的理论系统容量，误码率等关键性能指标，来验证和揭示所提系统的先进性和研究价值。同时也利用理论分析中取得的阶段性成果和新发现进一步调整优化所提中继传输方案；3）在所研系统中实现可根据实时的通信信道质量，对信源节点发射速率进行自适应调整的最佳速率调度机制；4）通过理论分析给出各种典型阀值，为实现多种中继系统间自适应切换，

中文关键词： 双路径连续中继；系统容量；同时同频全双工通信；最佳速率分配；数字域网络编码

英文摘要： Both the forthcoming deployment of the in-band full-duplex communication technology aided 5G wireless system and the simultaneous existence of tremendous half-duplex communication equipments determine that we have to incur the special full-duplex and half-duplex hybrid communications networks for a long time in the future. As a result, efficiently adapting the existed relaying techniques to this new communication scenario becomes a critical and urgent problem. For the sake of overcoming this challenge, our project aims at: 1) according to the special characteristic of the two-path successive relaying technique that it is capable of mimicking a virtual full-duplex relays relying on the collaboration between a pair of half-duplex relays, devising an novel spectral-efficient successive relaying based cooperative protocol for adapting to the full-duplex and half-duplex hybrid communications networks. As a result, the attempt of efficiently adapting the successive relaying technique to the full-duplex communication scenario will be achieved for the first time; 2) proving the advance of the proposed system and hence convincing the meaning of this research by theoretically analyzing both the capacity and error probability of the proposed scheme. Meanwhile, the potential achievements and new discoveries obtained along with the research process will be exploited to further update and improve our initial prototype; 3) realizing an optimal rate allocation scheme in the proposed system, which will be capable of automatically adjusting the transmit rate of the source nodes according to different physical communication conditions, and hence always maximizing the practical error-free transmit rate of the entire system; 4) finding a range of important thresholds through the theoretical analysis and simulation process, which may become the critical references for realizing adaptive selection among different relaying schemes.

英文关键词： two-path successive relaying;system capacity;in-band full-duplex communications;optimum rate allocation;digital network coding