mimo技术发展.doc

MIMO技术的发展摘要 分析了国内外研究现状与发展趋势，最后就MIMO技术的应用以分析介绍为深入认识与研究MIMO通信技术奠定了基础。 关键词：MIMO  ABSTRACT MIMO，which is short of Multiple-Input Multiple-Out-put or MTMRA，which is short of Multiple Transmit Multiple Receive Antenna is smart Antenna Engineerings major Breakthrough in Wireless Mobile Communication field.Such technology can multiply the capacity of communication system and the spectrum efficiency,which is the key technology that must be used in the new generation of mobile communication system. Currently, countries have started or plan the research of the new generation of mobile communications technology (3 G or 4 G) to ensure there is a place in the future of mobile communication field.With the development of technology, the future mobile broadband and wireless access fusion system become the hot research topic,and the multiple-input multiple-output (MIMO) system is one of the study direction which most people in it. This paper mainly studies the principle of MIMO wireless communication technology, analyzes the MIMO technology development history, the domestic and foreign research present situation and the development tendency,finally the MIMO technology application is introduced and analyzed,such lay the foundation for furth understanding and research of MIMO communication technology. Keywords: MIMO Multiple-Input Multiple-Out-put Wireless Mobile Communication 1引言 随着移动通信业务规模和种类的迅速发展，如何有效地利用相对贫乏的频谱资源提供更高质量、更高速率的通信服务成为业界关注的焦点。新一代无线通信技术以其高质量、高速率的移动多媒体传输目标让人耳目一新。然而，实现这一振奋人心的通信目标并非易事，常规单大线收发通信系统目前而临着严峻的挑战，即使采用常规发送分集、接收分集或智能大线技术也已小足以解决新一代无线通信系统的大容量与高可靠性需求问题。可庆幸的是，多入多出(MIMO)无线通信技术提供了解决该问题的新途径，它在无线链路两端均采用多大线，分别同时接收与发送，能够充分开发空间资源，在无需增加频谱资源和发送功率的情况卜，成倍地提升通信系统的容量与可靠性。然而，与常规单大线收发通信系统相比，MIMO通信系统中多大线的应用而临大量亟待研究的问题。 从2001年10月NTT DoCoMo开始提供3G商用业务以来，一些国家也陆续准备部署3G网络，但与此同时，世界各国也已经开始或者计划开始新一代移动通信技术的研究，争取在未来移动通信领域内占有一片立席之地。这里所提到的新一代移动通信是指后(beyond) 3 G或者4G。日前普遍认为后3G的最高传输速率将超过100M ;能够实现全球无缝漫游;具有非常高的灵话性，能自适应地进行资源分配;支持下一代Internet( IPv6)，而且是全IP网络;当