无线局域网中的智能天线技术  

Smart Antenna Technology for Wireless LAN Systems

作　　者：殷勤业[1] 张莹[1] 

机构地区：[1]西安交通大学信息与通信工程系,陕西西安710049

出　　处：《电子学报》2004年第F12期141-147,共7页Acta Electronica Sinica

摘　　要：针对无线局域网性能和速度等方面的不足 ,讨论采用智能天线技术改善无线局域网的性能 .重点介绍波束切换系统、自适应阵列天线系统以及基于收、发分集的多输入多输出系统在无线局域网中的应用 ,给出了不同系统的结构及关键技术 .最后介绍了一种实用的应用于IEEE 80 2 .1 1b标准的波束切换系统 .The article provides an overview of Smart Antenna technology in wireless LAN systems.Since Smart Antenna technology has powerful spatial processing ability,it is regarded as a promising solution to enhancing the data rates and capacity of wireless LAN systems.This article discusses the switched-beam based,the adaptive array based and Multiple-Input Multiple-Output based wireless LAN systems and their relevant key technologies.A set of small size,practical switched-beam antenna system,well suited for IEEE 802.11b Standard,is designed and tested.The antenna system has 9dB gain and can be applied to the wireless Access Point.Based on the testing results,an improved scheme is also proposed,with all the beams cophasal excited.

关 键 词：无线局域网 智能天线 波束切换 自适应阵列 多输入多输出 

分 类 号：TN925.93[电子电信—通信与信息系统]