I have searched this forum, and am currently refering to 3 books on WiFi, but still cant find the answer to this very basic question :-
How does DSSS "spread the signal" when sending data over the air ?
I am not talking about the barker code...
I understand that concept where 11 chips are used to represent 1 data bit.
My question is if a single frequency is used with phase modulation, then
does that not imply using only a SINGLE frequency ?
However all the docs say that the frequency is spread across 22 Mhz.
So are there multiple carrier frequencies used to transmit the data ?
I am confused because frequency = numer of ocilations in a fixed time = Hz.
So how can you "spread" a frequency over a bandwidth which is a range of frequencies ?
Hope my question makes sense.