noun Telecommunications.
detection ( def 4b ).

1920–25; de- + modulation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
demodulation (ˌdiːmɒdjʊˈleɪʃən)
electronics the act or process by which an output wave or signal is obtained having the characteristics of the original modulating wave or signal; the reverse of modulation

Collins English Dictionary - Complete & Unabridged 10th Edition
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Computing Dictionary

demodulation definition

To recover the signal from the carrier. For example, in a radio broadcast using amplitude modulation the audio signal is transmitted as the mean amplitude of a radio-frequency carrier so demodulation requires a circuit which measures the amplitude and filters out the carrier. There are many other kinds of modulation and corresponding demodulation.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Time base distortion errors can be estimated by complex demodulation.
Systems and methods are described for multidimensional signal modulation and/or demodulation for data communications.
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