【作者】 郭强；

【导师】 周希朗；

【作者基本信息】 上海交通大学 ， 电磁场与微波技术， 2010， 硕士

【摘要】 近年来,多输入多输出(MIMO)技术引起人们的广泛关注,已经发展为下一代无线通信系统的核心技术之一,在无线通信中扮演重要的角色。MIMO技术能够在不损失频带和发射功率资源的前提下,提供前所未有的数据传输速率,有效提高信道容量。波束形成与MIMO技术的结合能进一步提高系统容量,一些结合波束形成的MIMO系统方案已经被提出和应用。天线阵列的设置对于采用多天线的MIMO系统性能有很大影响。实际应用中,阵元间的互耦及信道空间相关在很多情况下都是不可忽略的因素。在这些因素下结合MIMO技术与波束形成的无线通信系统仿真分析,能够提高通信仿真的准确性,对于实际应用也具有重要的指导意义。本文围绕MIMO系统中的波束形成和天线阵配置,建立包含信道环境、空间相关、天线阵配置、互耦和匹配等的完整MIMO系统,深入研究了波束形成技术及其在MIMO系统中的应用、MIMO天线设计基础及天线配置对系统性能的影响,提出了完整的MIMO波束形成系统方案,给出了研究完整MIMO系统的Z参数和S参数分析方法。通过仿真实验对系统进行了研究和分析,得到了对于研究和分析更有意义的完整MIMO通信系统模型,相关的分析方法和结论对MIMO系统的建模仿真和实际分析都有借鉴意义。更多还原

【Abstract】 Multiple-input multiple-output (MIMO) technology has attracted exten- sive attention in recent years. It plays an important role and has become the core technology of next generation wireless communication systems. MIMO technology can offer unprecedented data transfer rate and promote channel capacity effectively, without loss of frequency band and transmit power. The combination of beamforming and MIMO technique could further improve system capacity. Some MIMO beamforming schemes have been proposed and applied. Antenna array configurations can significantly influence the performance of MIMO systems which use multi-antenna arrays. In practice, mutual coupling between antenna elements and spatial correlation are factors that can not be ignored in many cases. Simulation analysis of wireless communication systems, which combine MIMO and beamforming tech- nology and consider these factors, could improve simulation accuracy and have important guiding significance for practical application.This paper has studied the techniques of beamforming and antenna configurations in MIMO system, built a complete MIMO system model which include the effects of channel environment, spatial correlation, antenna configurations, antenna matching and mutual coupling, etc. In-depth study of beamforming technique and its application in MIMO system, MIMO antenna design basics and the effects of antenna configurations on system performance. We propose a complete MIMO beamforming scheme and give the Z-parameter and S-parameter analytical method. The system is analyzed and studied by simulation experiments. We obtain a more suitable complete MIMO communication system model for research and analysis. Related analytical methods and conclusions are worth learning for MIMO system modeling and practical analysis.更多还原