1多输入多输出系统的研究与设计摘要.docVIP

多输入多输出系统的研究与设计 PAGE I 摘要 无线通信系统为了达到高速率传输，近年来发展了发射端与接收端都使用多单元天线的架构，称之多输入多输出系统（MIMO）。该技术能在不增加带宽的情况下成倍地提高通信系统的容量和频谱利用率，是新一代移动通信系统必须采用的关键技术。在第三代（3G）乃至三代以后（B3G）的移动通信系统中有着广阔的应用前景。 本论文从MIMO无线通信系统的基本概念入手，介绍了MIMO系统发展的必要性，分析了它的结构和工作原理，然后从理论上推导了MIMO系统容量的公式，最后应用MATLAB软件对不同发射天线、不同接收天线、不同信噪比下的MIMO系统容量进行计算机仿真。仿真结果正如预期所料。本文的重点是推导MIMO系统容量公式并对它进行仿真验证。 关键词： MIMO，信道容量，容量仿真 Abstract The need for wireless data and multimedia services promotes the development and applications of many high-speed wireless communication techniques. The Multiple-Input Multiple-Output (MIMO) technology, which has the potential to multiply system capacity and improve spectral efficiency without requiring extra bandwidth and power, is considered as one of the most promising breakthrough technology to improve system performance, enhance the capacity and spectrum efficiency. It becomes an important technical breakthrough and promises to be one of the key technologies for future wireless communication systems, and hence has attracted broad attention and research interests in recent years. The MIMO technology has been already used in such systems as 3G, B3G and broadband wireless access. Although, the high performance promised by MIMO technology is highly dependent on the propagation channels. Meanwhile, we need to establish MIMO radio channel models and corresponding simulations to research key technologies and algorithms in MIMO systems and to evaluate the system performance. Based on such reasons, in this dissertation, MIMO wireless communication system and its capacity simulation channel was done. Keywords: MIMO, Channel capacity,capacity simulation