Comparison
- A1 A2 IEEE 802.11y-2008 extended operation of 802.11a to the licensed 3.7 GHz band. Increased power limits allow a range up to 5,000 m. As of 2009, it is only being licensed in the United States by the FCC.
- B1 B2 Assumes short guard interval (SGI) enabled, otherwise reduce each data rate by 10%.
| 802.11 network standards | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 802.11 protocol |
Release | Freq. (GHz) |
Bandwidth (MHz) |
Data rate per stream (Mbit/s) |
Allowable MIMO streams |
Modulation | Approximate indoor range | Approximate outdoor range | ||
| (m) | (ft) | (m) | (ft) | |||||||
| — | Jun 1997 | 2.4 | 20 | 1, 2 | 1 | DSSS, FHSS | 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 | — | — | 5,000 | 16,000 | ||||||
| b | Sep 1999 | 2.4 | 20 | 1, 2, 5.5, 11 | 1 | DSSS | 35 | 115 | 140 | 460 |
| g | Jun 2003 | 2.4 | 20 | 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 | 4 | OFDM | 70 | 230 | 250 | 820 |
| 40 | 15, 30, 45, 60, 90, 120, 135, 150 | 70 | 230 | 250 | 820 | |||||
| ac (DRAFT) | ~Feb 2014 | 5 | 20 | up to 87.6 | 8 | |||||
| 40 | up to 200 | |||||||||
| 80 | up to 433.3 | |||||||||
| 160 | up to 866.7 | |||||||||
| ad (DRAFT) | ~Dec 2012 | 60 | up to 7000 | |||||||
Read more about this topic: IEEE 802.11n-2009
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