【作者】 朱猛；

【导师】 单承赣；

【作者基本信息】 合肥工业大学 ， 电子与通信工程， 2006， 硕士

【摘要】 无线技术的出现实现了人类对于通信的终极梦想，真正摆脱了时间与空间的束缚，达到了随时随地随意进行沟通的可能。随着无线通信技术从模拟发展到数字，电信业务从语音通信到数据通信，出现了很多技术。而WLAN在过去的两年里得到了空前的发展，性能不断提高，应用范围不断扩大，价格不断降低。从个人用户、企业用户到运营商，整个产业链不断壮大，孕育着巨大的商机。根据中国电信和安徽电信对WLAN整体规划建设要求进行了本项目的研究。 本文介绍了WLAN采用的关键技术，IEEE 802.11协议的主要内容，以及应用范围和实例。该系列标准主要速率为1-2Mbps的802.11，11Mbps的802.11b，54Mbps的802.11a，22Mbps的802.11g，以及108Mbps的802.11n等。阐述了WLAN中OFDM数字调制技术，包括OFDM基本原理、调制方式、系统实现，同时还介绍了标准规范的物理层、数据链路层和安全性等。 通过与蓝牙、GPRS、CDMA1X、3G等无线数据通信技术的比较，阐述各种技术的优缺点和分析了各自的市场定位。 根据安徽省实际情况和目前各大电信运营商现状，提出安徽电信建设规划WLAN项目必要性。通过对认证技术(PPPOE、WEB+PORTAL、802.1X)的分析，提出适合安徽电信认证技术的全省WLAN组网方案。 利用安徽电信宽带用户发展情况与WLAN用户发展相关性，并运用一元线性回归预测方法，根据近4年的安徽电信宽带用户的变化来预测2007年WLAN用户、业务发展和运营策略，为安徽电信WLAN项目建设提供参考依据。更多还原

【Abstract】 The appearance of wireless technology realizes the mankind’s ultimate dream of communication, gets rid of the constraint of the time and space to make communication at anytime and anywhere possible. Many telecommunication technologies have appeared as the development of wireless communication technology from analogy to digital, telecom servi ce from voice to data communication. Wireless-LAN has got unprecedented development over the past two years, with the performance improving constantly, the range of application expanding constantly, and the price reducing gradually. The Wireless-LAN industry chain is strengthening constantly, having the enormous business opportunity, from personal users, to enterprise users to the telecommunication operators.According to thenecessarity of China Telcecom and Anhui Telecom’S WLAN plan,this article study the item.This article introduces the key technology that WLAN adopts, the main content of IEEE 802.11 and the range of application and some cases. The standard speed of this series is 802.11 of 1- 2Mbps, 802.11b of 11Mbps, 802.11a of 54Mbps, 802.11g of 22Mbps, and 802.11n of 108Mbps,etc. This article introduces OFDM’S digital modulation technique of WLAN ,including OFDM’S fundamental principle、 modulation technique and system realization. This article also introduces normal standard physics layer, data chain layer, security and etc.This article analyses the advantages and disadvantages of the different technology such as Bluetooth, GPRS, CDMA1X, 3G, etc, and it’s object markets, and put out the Wireless-LAN ’s application place at present.According to practical situation of Anhui Province and now all telecom running enterprises, the article gives us the necessity of Anhui Telecom WLAN’S item. According to the analysis of authentication technique(PPPOE、 WEB+PORTAL、802.1X), the article Anhui Telecom the building network of WLAN.Using the method of one linearity regression and according to the change of更多还原