大规模MIMO无线通信系统中传输优化理论和技术研究

As the data transmission in mobile communication systems increases drastically, the transmission rate in the fifth generation mobile communication systems (5G) is required to be much higher. Massive MIMO can significantly improve the spectrum efficiency and energy efficiency, and has become one candidate for the 5G standard. In this project, we will investigate transmission optimization theory and techniques for massive MIMO systems. More specifically, we will utilize information theory and random matrix theory to analyze the capacity of massive MIMO systems with correlated channels and line-of-sight channels. Based on the analysis result, we will utilize optimization theory and theories about correlation of sequences to investigate pilot design and allocation, as well as antenna downtilt optimization. Finally, transmission optimization theory and techniques for massive MIMO systems will be established. These results will provide the foundation of efficient massive MIMO systems.

随着移动通信系统中数据传输业务的急剧增长，人们对第五代移动通信系统的传输速率提出了更高的要求。大规模MIMO技术能够显著提高系统频谱效率和功率效率，已经成为第五代移动通信的候选标准之一。本项目将开展大规模MIMO系统的传输优化理论和技术研究，运用信息论、随机矩阵理论分析相关信道和直射信道中大规模MIMO系统的容量。在此基础上，运用优化理论、序列相关性理论研究导频设计与分配技术、天线下倾角优化技术，形成大规模MIMO系统的传输优化理论和技术，为构建高效能的大规模MIMO系统打下基础。

随着移动通信系统中数据传输业务的急剧增长，人们对第五代移动通信系统的传输速率提出了更高的要求。大规模MIMO技术能够显著提高系统频谱效率和功率效率，已经成为第五代移动通信的候选标准之一。本项目针对大规模MIMO 系统的不同信道条件，即相关信道、非相关信道、直射径信道，和小区条件，即单小区、多小区，研究了系统和速率及其与信道、信道相关矩阵、波达角的关系，研究了导频相关矩阵的优化算法、导频设计方法、导频分配方法、下倾角优化方法、信道估计方法、功率分配、波束成形和用户调度方法。这些研究结论可以应用于相关系统中的设计和优化，这些提出的方法能够在相应的系统中提高系统性能，可以应用于大规模MIMO系统的设计。