Frequency
division multiplexing (FDM) is an analog modulation technique that combines
analog signals. In FDM several frequencies bandwidths are carried through a
single line. Then it is transmitted to the receiver. In this case, in FDM we use
guard bands within two bandwidths. Using guard band is a technique that use in
FDM for synchronization. We can see it in this figure.
When we transmit these 10 kHz bandwidths
(signals) to receiver without guard (5 kHz) bands, the receiver cant identity
what is the 1st, 2nd, 3rd signal. It hasn’t
any understand about the bandwidth of the signal.
We
can see in this figure, if we use a guard band between them the receiver can
identify the signals. It can know the bandwidth of the signal.
That’s
how synchronization technique used in analog FDM.
Throughout this article I hope you may get some thing.
This provides very basic explanation and future will cover more. Comments are well come. Thank you.
The provider should also allow easier scaling up. This is because as the business grows, there will be need for more bandwidth as the internet traffic is likely to be higher.
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