MIMO-OFDM信道估计技术研究与系统实现
发布时间：2018-09-18 13:57
【摘要】：随着人们对通信行业高质量、高效率、多媒体业务需求的日益增长,无线通信系统中频带利用率提高以及系统容量提升的必要性越来越突出。而MIMO-OFDM技术正是B3G、4G乃至5G通信中都会发挥此重要作用的一种数据传输解决方案,一直以来被当成通信领域研究的热点。而MIMO-OFDM系统的信道估计技术又是系统实现良好通信的至关重要的环节,其信道估计性能的好坏直接影响系统的信息传输质量。本文主要的研究内容就是MIMO-OFDM系统的信道估计技术。首先,本文介绍了无线移动通信技术的发展过程,简单概括了目前信道估计技术的方法分类以及MIMO-OFDM系统信道估计技术的发展背景。研究分析了无线通信中的几种常用信道模型以及MIMO技术、OFDM技术、MIMO-OFDM系统的基本原理和特征。其次,本文就MIMO-OFDM系统的核心技术信道估计技术进行了详细的讨论和分析。介绍了几种常用的导频插入方式,对MIMO-OFDM系统的LS时域、频域信道估计技术作了比较详尽的介绍,并给出其软件仿真结果。针对LS信道估计技术的弱点,本文又介绍了MMSE技术以及其改进的LMMSE技术,给出仿真结果与理论分析。最后,在以上理论知识以及算法支持的基础上,结合本人在实验室的科研实践,给出了MIMO-OFDM系统收发端整体的SYSTEM GENERATOR的硬件仿真模型搭建,并对系统中的每个功能模块进行测试以及波形观察。
[Abstract]:With the increasing demand for high quality, high efficiency and multimedia services in the communication industry, the necessity of improving the frequency band efficiency and the capacity of the wireless communication system is becoming more and more prominent. MIMO-OFDM technology is a kind of data transmission solution which will play an important role in B3GN 4G and even 5G communication. It has always been regarded as a hot research topic in the field of communication. The channel estimation technology of MIMO-OFDM system is the most important link to achieve good communication. The performance of channel estimation directly affects the quality of information transmission. The main research content of this paper is the channel estimation technology of MIMO-OFDM system. Firstly, this paper introduces the development of wireless mobile communication technology, briefly summarizes the classification of current channel estimation techniques and the background of channel estimation technology in MIMO-OFDM systems. Several common channel models in wireless communication and the basic principles and characteristics of MIMO-OFDM system based on MIMO technology are studied and analyzed. Secondly, the channel estimation technology of MIMO-OFDM system is discussed and analyzed in detail. In this paper, several common pilot insertion methods are introduced. The LS time-domain and frequency-domain channel estimation techniques for MIMO-OFDM systems are introduced in detail, and the software simulation results are given. Aiming at the weakness of LS channel estimation technology, this paper introduces the MMSE technology and its improved LMMSE technology, and gives the simulation results and theoretical analysis. Finally, on the basis of the above theoretical knowledge and algorithm support, combined with my scientific research practice in the laboratory, the hardware simulation model of the whole SYSTEM GENERATOR in the transceiver of MIMO-OFDM system is presented. Each function module of the system is tested and the waveform is observed.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53
[Abstract]:With the increasing demand for high quality, high efficiency and multimedia services in the communication industry, the necessity of improving the frequency band efficiency and the capacity of the wireless communication system is becoming more and more prominent. MIMO-OFDM technology is a kind of data transmission solution which will play an important role in B3GN 4G and even 5G communication. It has always been regarded as a hot research topic in the field of communication. The channel estimation technology of MIMO-OFDM system is the most important link to achieve good communication. The performance of channel estimation directly affects the quality of information transmission. The main research content of this paper is the channel estimation technology of MIMO-OFDM system. Firstly, this paper introduces the development of wireless mobile communication technology, briefly summarizes the classification of current channel estimation techniques and the background of channel estimation technology in MIMO-OFDM systems. Several common channel models in wireless communication and the basic principles and characteristics of MIMO-OFDM system based on MIMO technology are studied and analyzed. Secondly, the channel estimation technology of MIMO-OFDM system is discussed and analyzed in detail. In this paper, several common pilot insertion methods are introduced. The LS time-domain and frequency-domain channel estimation techniques for MIMO-OFDM systems are introduced in detail, and the software simulation results are given. Aiming at the weakness of LS channel estimation technology, this paper introduces the MMSE technology and its improved LMMSE technology, and gives the simulation results and theoretical analysis. Finally, on the basis of the above theoretical knowledge and algorithm support, combined with my scientific research practice in the laboratory, the hardware simulation model of the whole SYSTEM GENERATOR in the transceiver of MIMO-OFDM system is presented. Each function module of the system is tested and the waveform is observed.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53
【相似文献】
相关期刊论文 前10条
1 蒋笑冰;;多小区信道估计技术的研究[J];铁路计算机应用;2010年07期
2 王丹;杨雷;;无线通信系统信道估计技术研究现状[J];微型机与应用;2011年16期
3 姚建光;;正交频分复用系统信道估计技术研究[J];中国新通信;2012年20期
4 张岩波;;正交频分复用系统信道估计技术研究[J];现代电子技术;2012年21期
5 王军选;;移动通信中的信道估计技术[J];现代电子技术;2006年19期
6 盛洪宁;;LTE上行信道估计技术研究[J];电子科技;2011年06期
7 王q，
本文编号：2248130
本文链接：https://www.wllwen.com/kejilunwen/wltx/2248130.html
