Etymology:
Meaning:
Demodulation is the process of extracting the original information signal from a modulated carrier signal.
Origin:
The term "demodulation" originated in the early 20th century with the development of radio communication.
Explanation:
When an information signal (such as audio or data) is transmitted over a long distance, it is often modulated onto a carrier signal (a higher frequency wave) to improve transmission efficiency. The process of converting the information signal into a modulated carrier signal is called modulation.
At the receiving end, the modulated carrier signal must be demodulated to recover the original information signal. This is done by filtering out the carrier signal and using the remaining information signal to recreate the original data.
Common demodulation techniques include:
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