中继协作通信系统中的干扰对齐技术研究

项目名称： 中继协作通信系统中的干扰对齐技术研究

项目编号： No.61302101

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 傅友华

作者单位： 南京邮电大学

项目金额： 23万元

中文摘要： 中继协作通信基于分布式协作的方式能提高无线通信频谱效率和网络覆盖，但通信节点共享无线信道这一媒介会不可避免地出现多用户干扰，这将降低通信性能。干扰对齐技术能利用多用户协作通信有效消除干扰，充分挖掘通信网络的自由度，成为干扰信道中一项非常值得探索的重要技术。本项目拟从中继协作通信系统中基于干扰对齐技术展开新型中继通信理论和方法的研究，达到显著提高中继网络资源利用率的科学目标。拟建立典型的中继系统模型，研究融合多天线和中继协作分集等技术的基于干扰对齐的多用户中继传输理论；同时在双向/多向中继传输系统中充分考虑信道互易性特征，设计高效的干扰对齐实施方案；并研究由于中继通信分布式协作而必然利用不完全信道状态信息的实用的鲁棒干扰对齐技术；进而对所提传输方案根据信道传播特性发展网络的和容量等性能分析。这些研究将提供大幅提升无线网络传输效率的有效途径，为新一代移动通信的发展提供重要的理论依据和技术支撑。

中文关键词： 中继协作；干扰对齐；多用户协作；计算前传；

英文摘要： Relay-based cooperation communication, with the distributive and cooperative operation, can improve the spectral efficiency and coverage extension of the network. However, since all nodes share the wireless channel to transfer message, multi-user interference is inevitably occuring, and this can degrade the system performance. Interference alignment can eliminate the inter-user interference effectively and achieve higher degrees of freedom by exploiting the cooperation. As such, interference alignment is worth exploring as an important technique in the intereference channel. In this project, we will study the relay-aided and multi-user communication theory and the interference cancellation technique based on interference alignment after building the typical relaying system models, in conjunction with multi-antenna technique and relay cooperative diversity. Besides, the reciprocity of two-way or multi-way relay channels will be utilized for designing the interference alignment schemes. Moreover, it is important to find the robust processing for interference alignment with only imperfect channel knowledge in the practical relay-aided communication scenarios due to the distributed cooperation. Beyond these, the system performance such as the sum capacity of the proposed scheme will be analyzed. Our work will provid

英文关键词： Relay Cooperation；Interference Alignment；Multi-user Cooperation；Compute-and-Forward；