2.4 – 2.5 GHz
5.15 – 5.35 GHz
5.47 – 5.725 GHz (not permitted in all countries)
WLAN is used for wireless connection of computers and devices over short to medium distances. Numerous variants have been standardized by IEEE.
The numerous standards mean that there are many permitted modulation types. The following are frequently used: FHSS (frequency hopping spread spectrum) in older systems with 1 – 2 Mbit/s capacity, DSSS (direct sequence spread spectrum) with up to 54 Mbit/s capacity, and COFDM (coded orthogonal frequency division multiplex).