802.11技术简介

21GPRS

 802.11是嵌入式系统常用到的wifi技术之一，这里分享802.11技术简介，英文版，现硬着头皮看看吧。
Introduction 
The purpose of this document is to give technical readers a basic overview of the new 802.11 Standard, in such a way that they will be able to understand the basic concepts, the principle of operations, and some of the reasons behind some of the features and/or components of the Standard. 
Obviously the document does not cover all the Standard, and does not provide enough information for the reader to implement an 802.11 compliant device (for this purpose the reader should read the Standard itself which is a several hundred pages document). 
This version of the document addresses mainly Functional and MAC aspects, a detailed description of the PHY layer will be provided in a following document. 
This version of the document is actualized to Draft 4.0 of the Standard. 
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