协作mimo系统的空时编码分析研究 学位论文.doc

毕业设计（论文 题 目 空时编码 　 专 业 学　　 号 学 生 指 导 教 师 答 辩 日 期 摘 要 通信的发展离不开频谱资源的利用问题因此许多研究的重点都放在了提高频谱利用率、增大信道容量等的问题上。在 MIMO 系统中引入利用分集的空时编码技术可以很好的减少信号衰落的影响，能够降低误码率，获得信号的增益。 本文先是介绍了 MIMO 系统的特性以及研究的现状分析当前的研究点。论述了根据无线信道的特性通过引入空时编码可以获得的优势。然后再分析了常见的空时编码理论解决方案通过对常见的解决方案的性能仿真和研究理论证明空时编码理论对于提高频谱利用率方面确实有积极的影响对于不同空时编码的优劣情况及理论应用前景最后做了详细的分析。本文最后一章是结合四种MIMO系统模型而研究了空时编码在MIMO 系统中如何应用的问题通过和其他系统或是不同编码方案的性能仿真比较分析给出了空时编码方案在 MIMO系统下的可行性研究。 关键词：MIMO系统分集增益空时编码Abstract The development of communication depends on the utilization of spectrum resource, so many researches focus on the problem of improving the utilization of spectrum and increasing the capacity of the channel. In the MIMO system, the use of the space-time coding technique can reduce the error rate and gain the signal. This paper first introduces the characteristics of the MIMO system and the status of the research, and analyzes the current research points. According to the characteristics of the wireless channel, the advantage of the time coding is introduced. After analyzing the common space-time coding theory solutions, through the common solution performance simulation and research. It is proved theoretically that the space-time coding theory to improve the spectrum utilization does have a positive impact, for different space-time coding advantages and application prospect of the theory and detailed analysis. In the last chapter of this paper, combined with four kinds of MIMO system model and study the space-time coding in the MIMO system how to apply the problem. Comparing with other systems or to simulate the performance of different coding schemes for comparative analysis, gives the space-time coding scheme in MIMO system feasibility study. Keywords: MIMO system, Diversity, Transmission gain, Space-time code 目 录 摘要 I Abstract II 第1章 绪 论 1.1 课题背景、目的和意义 1 1.2 主要研究内容 2 1.3 本文结构 3 第2章 无线信道特性 2.1 MIMO系统 4 2.1.1 无线信道系统分类