This topic has got me so much confused.
In terms of Wi-Fi, when we say the 802.11b has 22 MHz of Channel Bandwidth, what does it mean? When we refer to a particular Channel No. say Channel 1, it has its center frequency of 2412 MHz, but it spans from 2401 MHz (-11 MHz) to 2423 MHz (+ 11 MHz) to form a 22 MHz channel. Why is that? Why can't the channel be just 2412 MHz signal?
How does the data utilize the 22 MHz width?
Also how does increasing the Bandwidth help in increasing the throughput (not data rate)? No highway examples please, because those are layman and incorrect analogies.