There are 2 frequency bands for sending IEEE 802.11 datat - 2.4GHz and 5 GHz. The part of the radio that turns biuts into analog is called the modem (or baseband section). The second part is very high frequency electronics to drive the antenna, usually called the radio frequenct (RF) section.
Improvements in modem techniques have resulted in successive version of IEEE 802.11 offerings. The initial 1997 standard provided 2Mbps in the 2.4GHz band. 802.11a increased to 54Mbps in 5GHz due to better modem and medium. 802.11b increased the speed to 11Mbps in 2.4GHz band. 802.11g further increased speeds again in 2.4GHz by more sophisticated modem technique.
No comments:
Post a Comment