毕业设计（论文）-WIFI技术与覆盖研究精选.doc

2012届本科毕业论文 wifi技术与覆盖研究 单 位: 专 业: 姓 名: 指导教师: 完成年月: 二○一二 年 六 月 wifi是一种短距离无线传输技术，目前已经包括家庭、办公室，以及越来越多的咖啡屋、酒店、机场等得到了大范围的应用MIMO、OFDM、智能天线等关键技术，再经过对wifi网络覆盖与优化的认真分析，重点研究了wifi网络的应用。wifi网络在民用领域已经得到广泛使用，有着成熟的应用模式，许多行业都部署了wifi网络。随着wifi将具有广阔的发展前景Abstract wifi is a short-range wireless transmission technology, has a high-speed, convenient features, allows users to access the network anytime, anywhere, including homes, offices, and a growing number of coffee shops, hotels, airports and other places has been a bigrange of applications. Wifi forward-looking, so many manufacturers to support them, wifi areas of R D and the market will continue to expand. Overall elaborated first wifi technology, wifi technology development process of the wifi network Research and technical features, and details from the technical principles, advantages and disadvantages, MIMO, OFDM, smart antennas and other key technologies used in wifi after a careful analysis of the wifi network coverage and optimization focuses on the application of the wifi network. wifi network has been widely used in civilian areas, has a mature application mode, many industries are deployed to the wifi network. With the continuous improvement of wifi, I believe this technology will be more widely used, in the future, the wifi will have broad prospects for development. Keyword：wifi technology network coverage application 目 录 1 wifi技术概述 1 1.1 wifi简介 1 1.2 wifi技术发展历程 1 1.3 wifi网络研究现状 2 1.4 wifi技术特点 2 2 wifi关键技术 4 2.1 MIMO技术 4 2.1.1 MIMO技术概述 4 2.1.2 MIMO技术原理 4 2.1.3 MIMO的三种主要技术 5 2.1.4 MIMO三种技术的优缺点及应用场景 5 2.2 OFDM技术 6 2.2.1 OFDM技术原理 6 2.2.2 OFDM系统的关键技术 6 2.2.3 OFDM技术的优点 7 2.2.4 OFDM技术的缺点 7 2.3 MIMO-OFDM技术 8 2.3.1 MIMO与OFDM的结合 8 2.3.2 MIMO-OFDM系统的关键技术 8 2.4智能天线技术 9 2.4.1智能天线概述 9 2.4.2 智能天线系统 9 3.wifi网络覆盖优化 11 3.1 无线局域网络 11 3.1.1无线局域网络组建方法 11 3.1.2无线局域网络的拓扑结构 11 3.2 wifi无线局域网络的组成部分 12 3.3 wifi无线局域网构建的约束条件 12 3.4 wifi无线局域网络覆盖及优化 13 3.4.1 wifi覆盖区域类型 13 3.4.2 wifi覆盖优化 13 4 wifi网络应用 15 4.1 wifi网络应用现状 15 4.1