Frequency Division Multiplexing

Frequency Division Multiplexing (FDM) is a method of transmitting multiple signals over a single communication channel by assigning each signal to a different frequency band. Think of it like several radio stations broadcasting simultaneously on different frequencies; each station's signal doesn't interfere with others because they occupy separate parts of the spectrum. At the receiving end, filters isolate each frequency band, allowing the original signals to be separated and understood. FDM efficiently uses available bandwidth, enabling multiple data streams—like phone calls, TV channels, or internet traffic—to share a single medium without overlap.