多用户中继干扰信道的干扰管理算法研究

Interference Alignment (IA) and Interference Neutralization (IN) are interfernce management techniques which can effectively improve system capacity and characterize the degrees of freedom (DoF) of multiuser interference channels. However, the exact DoF expression and feasibility conditions of the interference management algorithms for the general multiuser interference channels remain unclear. This project focuses on the interference management techniques for the relay interference channels, including the half-duplex and full-duplex K-user relay interference channels and the K×K×K relay nterference channels. Through exploiting the space dimensions introduced by relay(s), we develop interference management algorithms based on IA and IN for the general multiuser relay interference channels, which are expected to simplify the algorithms’ design and analysis so as to obtain the closed-form DoF expression and the feasibility conditions. And then, we investigate the transmission methods and interference management algorithms to furthermore improve system capacity for general multiuser interference channels. In summary, the research results are of important both theoretical guidance and application value in characterizing the DoF of multiuser interference channel and improving its performance.

干扰对齐（IA）和干扰中和（IN）是有效提升多用户干扰信道系统容量的干扰管理技术，并能用于刻画多用户干扰信道的自由度(DoF)特性。然而，具有一般结构的多用户干扰信道的准确DoF描述以及相应的干扰管理算法的可行性条件仍是未知的。为此，本项目针对半双工K用户中继干扰信道、全双工K用户中继干扰信道以及K×K×K中继干扰信道展开研究。本项目拟利用MIMO中继引入的空间维度，设计基于IA和IN的多用户中继干扰信道的干扰管理算法，旨在简化一般多用户中继干扰信道的干扰管理算法设计与分析的复杂度，从而获得获得封闭形式的多用户中继干扰信道的DoF描述和干扰管理算法的可行性条件。在此基础上，本项目研究进一步提升多用户中继干扰信道系统容量的干扰管理算法。本项目的研究结果对于刻画多用户中继干扰信道容量以及提升系统性能具有重要的理论意义和应用价值。

干扰是限制下一代移动通信系统性能的关键因素，而干扰对齐（IA）和干扰中和（IN）是有效提升多用户干扰信道系统容量的干扰管理技术，并能用于刻画多用户干扰信道的自由度(DoF)特性。本项目针对半双工多用户中继干扰信道、全双工多用户中继干扰信道以及Massive MIMO系统展开研究。本项目利用MIMO中继引入的空间维度，设计基于IA和IN的多用户中继干扰信道的干扰管理算法，简化了多用户中继干扰信道的干扰管理算法设计与分析的复杂度，并获得获得多用户中继干扰信道的DoF描述和干扰管理算法的可行性条件。在此基础上，本项目针对异构蜂窝网络，设计了相应的干扰对齐算法并推导了算法的可行性条件，推导出了蜂窝异构网络的可达DoF特性。还针对Massive MIMO多用户下行链路，研究分析了其能效-频带效率的折中关系。本项目的研究结果对于刻画多用户中继干扰信道容量以及提升系统性能具有重要的理论意义和应用价值。