1、Features of 802.11n
* PHY
----- Major - MIMO
----- Other
> STBC
> LDPC
> Short guard interval(GI)
> Greenfield preamble
*MAC
----- Major - frame aggregation
----- Reverse direction protocol - sublease unused TXOP
----- RIFS for burst frames
2. What's New in 11n ?
> Spatial Division Multiplexing through MIMO
> Bandwidth Expansion (20/40 MHz)
> New MCS Sets
> Higher Rate Binary Convolutional Code
> Low Density Parith Check Code
> Short GI
> Space-Time Block Codes
> Transmit Beamforming
> Spatial Expansion
> Channel Sounding
> New Preambles
3. New in 11n:
> Frame aggregation
> Reverse Detection
> New Power-save
> 20/40 operation
> RIFS; 40MHz protection mechanisms
4. 802.11n issues
> 20/40 MHz channels ?
A lot of effort om coexistences
> HT
> Beamforming
