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Wireless LAN Standards Overview
WLAN Netzwerke sind über den IEEE802.11 Norm standardisiert. Die Tabelle fasst die wichtigsten Eigenschaften der einzelnen WLAN Übertragungsstandards zusammen.

Wireless networks are standardized by the IEEE802.11 norm. This Tabele gives an overview of the main features of the different wireless transmission standards.
Standard IEEE 802.11b IEEE 802.11a IEEE 802.11g IEEE 802.11n
Year Approved 1999 1999 2003 2009
Compatibility to IEEE 802.11b IEEE 802.11a IEEE 802.11b/g IEEE 802.11a/b/g
Frequency Band 2.4 GHz 5 GHz 2.4 GHz 2.4/5 GHz
Channel Bandwidth 20 MHz 20 MHz 20 MHz 20 or 40 MHz
Number of Spatial Streams 1 1 1 1 to 4
Max. Data Rates 11 Mbps 54 Mbps 54 Mbps 600 Mbps
Data Rate Configurations 4 8 12 (a) 576 (c)
Spread Spectrum DSSS OFDM OFDM, DSSS OFDM
Typical Indoor Range (b) 30...45 m 10...15 m 30...45 m 45...60 m
Typical Outdoor Range (b) 60...90 m 15...30 m 60...90 m 140...180 m
(a) IEEE 802.11b includes backwards compatibility • (b) A general rule of thumb for planning wireless networks • (c) Theoretical data rate with 4-stream MIMO
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