Demodulation Definition

Demodulation is a basic way of getting a signal from a modulated carrier wave. Almost every type of communication channels uses it, from radio and television, to wireless networks or digital data transmission devices. The most spread ways of including information on carrier waves are those by amplitude (AM), frequency (FM), and phase modulation (PM). During the demodulation process, in basic terms, further processing of the signal is done so that the original signal waveform or data could be found.

In general, this is done through a filtering out of unwanted noise and interference while at the same time retaining a wanted signal through amplification and frequency conversion techniques. Accordingly, demodulation circuits or algorithms are designed according to the modulation technique so that delivery of transmitted information is made possible with ease and exactitude. With the processes of recording, simultaneous re-airing, and/or rebroadcast now being handled by wireless internet, cell networks, and other modern, digitally-based equivalents instead of traditional broadcast radio and television technologies, reception and decryption are involved.