5G移动通信系统物理层关键技术研究(任务书,开题报告,论文14800字)
摘要
随着智能手机和平板电脑之类的智能设备的普及和人们对于通信速率和质量的要求的提高，现在的4G无线通信技术也慢慢到了业务能力的极限，越来越难以适应人们对通信业务量和速率的要求。于是，第五代移动通信技术应运而生。
5G移动通信采用许多新的空中接口技术，因此目前所提交给3GPP的空中接口备选协议也称为New Access (NA)协议。本文对目前3GPP组织所选用的5G物理层协议所包含的关键技术进行学习研究，分析技术背景和基本原理，具体包括信道编码技术，毫米波通信技术，OFDMA技术，大规模MIMO技术等。
首先，本文主要研究了5G无线通信技术的研究背景，研究现状和发展历史和核心技术。其次，在第二章中研究了信道编码中的多元低密度校验（LDPC）码技术，详细介绍LDPC码的优点，基本概念和因子图。再次，在第三章研究了毫米波通信技术的难题和硬件技术，主要是射频前端和天线，还有比较重要的波束赋形架构和技术。然后，在第四章主要研究了多址技术中的正交频分多址技术，本章详细介绍了正交频分多址的基本原理和基本框图，以及上下行链路的发射机接收机框图。接着，在第五章中主要研究了大规模多用户输入多用户输出技术的基础理论和系统容量。最后，本文在最后一章中总结全文并且畅想了2020年5G时代到来后的情景。
关键词：5G移动通信；毫米波通信；大规模MIMO；OFDMA技术；
Abstract
With the popularization of smart devices such as smart phones and tablets and people’s increasing demands on communication speed and quality, the current 4G mobile communication technologies have slowly reached the limit of service capabilities and are increasingly unable to meet people's demand for communication traffic and speed. Thus, the fifth generation of mobile communication technology came into being.
5G mobile communication uses many new air interface technologies, so the air interface alternative protocol currently submitted to 3GPP is also called the New Access (NA) protocol. This article studies the key technologies contained in the current 5G physical layer protocol selected by the 3GPP organization, and analyzes the technical background and basic principles, including channel coding technology, millimeter-wave communication technology, multiple access technology, and massive MIMO technology.
First of all, this paper mainly studies the research background, research status and development history and core technology of each generation of mobile communication technology. Secondly, in the second chapter, the LDPC code technology in channel coding is studied. The characteristics, basic principles, basic concepts and factor graphs of LDPC codes are introduced in detail. Again, in the third chapter, the problems and hardware technologies of millimeter-wave communication technology are studied, mainly the RF front-end and antenna, as well as the important beamforming architecture and technology. Then, in the fourth chapter mainly studied the orthogonal frequency division multiple access technology in the multiple access technology, this chapter introduced the basic principle and basic block diagram of OFDMA in detail, and the transmitter and receiver block diagram of the uplink and downlink. Then, in Chapter 5, the basic principle and system capacity of massive MIMO technology are mainly studied. Finally, this article summarizes the full text in the last chapter and imagines the coming of the 5G era in 2020.
Key Words：5G mobile communications；Millimeter Wave Communication；Massive MIMO；OFDMA technology；
目录
第1章绪论 1
1.1研究背景 1
1.2研究现状 2
1.3本文研究内容 2
第2章信道编码技术 4
2.1现代信道编码技术 4
2.2 多元LDPC 5
2.2.1多元LDPC码的基本概念 5
2.2.2多元LDPC码译码算法 7
第3章毫米波通信技术 9
3.1 毫米波通信背景 9
3.1.1毫米波通信的发展 9
3.1.2毫米波通信的难题 10
3.1.3 毫米波系统的部署 10
3.2 毫米波系统硬件技术 10
3.2.1射频前端和天线 10
3.2.2波束赋形架构 11
3.2.3波束赋形技术 13
第4章多址接入技术 15
4.1 多址技术发展现状 15
4.2 正交频分多址 16
第五章大规模MIMO 19
5.1 技术背景 19
5.2 大规模MIMO基本理论 20
5.2.1单天线系统 20
5.2.2多天线系统 21
5.2.3系统模型和容量 21
第六章结语 24
参考文献 26
致谢 28
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