网络编码在MIMO多向中继信道中的优化设计与性能分析

项目名称： 网络编码在MIMO多向中继信道中的优化设计与性能分析

项目编号： No.61471241

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 袁晓军

作者单位： 电子科技大学

项目金额： 83万元

中文摘要： 本项目针对国家重大专项新一代宽带无线移动通信网中对新一代移动通信网络关键技术研发、标准化和产业化的中长期规划和要求，研究网络编码和MIMO技术在无线中继网络中的应用，分析MIMO多向中继信道中的干扰形成机制，设计网格编码、线性预编码、网格预编码、连续干扰消除等先进的抗干扰技术，提出结合MIMO-网络编码-抗干扰技术的联合设计方案，并优化中继网络参数使得系统性能逼近理论最佳值。本项目的关键难点在于如何在多向中继网络中联合设计网络编码和MIMO技术，有效地控制和消除多用户干扰和流间干扰，从而达到或靠近网络的性能极限。本项目将系统地研究这些关键技术，从信息论的角度分析与推导无线中继网络的信道容量极限，填补MIMO多向中继网络的信道容量这一重要理论研究领域的空白。同时，本项目的研究成果将大幅提升无线网络的频谱效率和数据吞吐量，进而为新一代移动通信网络的设计与标准化提供解决方案。

中文关键词： MIMO中继；多向中继；网络编码

英文摘要： Physical-layer network coding (PNC) has been intensively investigated in the past several years. The simplest model for PNC is the two-way relay channel (TWRC), in which two users exchange information via the help of a single relay. The conventional protocol for TWRC requires four phases to complete one round of information exchange, while PNC reduces the required number of phases to two by allowing two users to transmit/receive signals simultaneously, so as to double the network throughput. A multiway relay channel (MWRC), as a natural generalization of TWRC, allows an arbitrary number of users to exchange information via a relay. However, as the relay simultaneously serves a large number of users in a MWRC, the network throughput is usually bottlenecked by the relay's capability of receiving and transmitting signals. In the proposed research, we intend to eliminate the above bottleneck by introducing multiple-input multiple-output (MIMO) into MWRCs, which enables the relay and users to transmit and receive multiple signal streams simultaneously. The goal of the proposed research is to investigate the joint design of the cutting-edge technologies (including MIMO, PNC, and advanced error-correction coding, etc) for MWRCs, and to push them towards the fundamental performance limit of the network. This is a very challenging task, given the fact that so far we have limited knowledge on the capacity of wireless networks, even for the simplest three-node TWRC model. To fulfill this goal, it is of critial importance to carefully manage interference in a MIMO MWRC: on one hand, signal streams from different users cause multiuser interference in the relay network; on the other hand, each user transmits multiple spatial signal streams, which gives rise to inter-stream interference. The proposed research aims to design and analyze various advanced interference alignment/suppression/cancellation techniques, including but not limited to, lattice coding, linear precoding, lattice precoding, and successive interference cancellation, etc. We will investigate the joint design of network coding and the interference management techniques for MIMO MWRCs, and propose solutions to approach the fundamental performance limit of the relay networks. If successful, this research will bring forward a solid step in the theory and priacice of PNC for MIMO relay channels, and can provide key technologies for the next generation wireless communication networks.

英文关键词： MIMO Relay Network;Multiway Relaying;Network Coding