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Revision as of 07:26, 21 February 2010

802.11 network standards
802.11
Protocol
Release[1] Freq.
(GHz)
Bandwidth
(MHz)
Data rate per stream
(Mbit/s)[2]
Allowable
MIMO streams
Modulation Approximate indoor range[citation needed] Approximate Outdoor range[citation needed]
(m) (ft) (m) (ft)
Jun 1997 2.4 20 1, 2 1 DSSS 20 66 100 330
a Sep 1999 5 20 6, 9, 12, 18, 24, 36, 48, 54 1 OFDM 35 115 120 390
3.7[y] -- -- 5,000 16,000[y]
b Sep 1999 2.4 20 1, 2, 5.5, 11 1 DSSS 38 125 140 460
g Jun 2003 2.4 20 1, 2, 6, 9, 12, 18, 24, 36, 48, 54 1 OFDM, DSSS 38 125 140 460
n Oct 2009 2.4/5 20 7.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65, 72.2[z] 4 OFDM 70 230 250 820[3]
40 15, 30, 45, 60, 90, 120, 135, 150[z] 70 230 250 820[3]
  • y IEEE 802.11y-2008 extended operation of 802.11a to the licensed 3.7 GHz band. Increased power limits allow for a range up 5000m. As of 2009, it is only being licensed in the United States by the FCC.
  • z Assumes Short Guard interval (SGI) enabled, otherwise reduce each data rate by 10%.


  1. ^ "Official IEEE 802.11 working group project timelines". Sept. 19, 2009. Retrieved 2009-10-09. {{cite web}}: Check date values in: |date= (help)
  2. ^ "Wi-Fi CERTIFIED n: Longer-Range, Faster-Throughput, Multimedia-Grade Wi-Fi® Networks" (registration required). Wi-Fi Alliance. September 2009.
  3. ^ a b "802.11n Delivers Better Range". Wi-Fi Planet. 2007-05-31.