Wireless LANs
Overview
Mobile vs Wireless
CDMA
Frequency Hopping Spread Spectrum
Spectrum
Slow Frequency Hop Spread Spectrum
Fast Frequency Hop Spread Spectrum
Direct-Sequence Spread Spectrum
DS Spectrum
Code Division Multiple Access (CDMA)
CDMA Example
CDMA Encoding and Decoding
OFDM
Wireless LAN Requirements
Infrared LANs
IEEE 802.11 Features
Hidden Node Problem
4-Way Handshake
IEEE 802.11 MAC
Peer-to-Peer or Base Stations?
IEEE 802.11 Architecture
Architecture
IEEE 802.11 Priorities
Time Critical Services
Power Management
Frame Format
MAC Frame Fields
802.11 Address Fields
Station Location
IEEE 802.11 Phy
Why 2.4 GHz?
FHSS Phy
DSSS Phy
Infrared Phy
802.11 Physical Layers
IEEE 802.11 Protocol Architecture
802.11a
802.11b
802.11g
Summary
Reading Assignment
Homework
Home Page: http://www1.cse.wustl.edu/~jain/
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