Demodulation is the inverse operation of modulation: it extracts the original information-bearing signal from a modulated carrier wave. The demodulator reverses the property variations imposed during modulation — recovering amplitude, frequency, or phase deviations that map back to the source information. It is the complement of modulation in every transceiver, without which received signals remain unintelligible carrier. Common implementations include envelope detectors for AM, discriminators for FM, and coherent or phase-locked loop receivers for phase-modulated schemes. The persistence mechanism is mathematical specification encoded in communication standards and implemented in receiving hardware.\n\n[formal: demodulatio | substrate: behavior | horizon: hours | explicit: yes | epoch: 0.01]
Accepted ontology entry
demodulation
Demodulation is the inverse operation of modulation: it extracts the original information-bearing signal from a modulated carrier wave. The demodulator reverses the property variations imposed during modulation — recovering amplitude, freq…
Definition
Why it is in scope
A signal processing technique that extracts the original information signal from a modulated carrier wave
Names and aliases
- demodulationen · CANONICAL
Relations from this entry
- cmsps9i0v06eejlssqrjcqyviSERVES →
Demodulation is a technique built for the sake of recovering information from modulated carriers within signal processing practice. Remove demodulation and receivers cannot recover the original signal from its modulation — the processing stops operating.
- cmrc6dopv00jba9g4op1ivbb1SERVES →
Demodulation is a technique built for the sake of recovering transmitted information in communication systems. Remove demodulation and receivers cannot extract the original signal from its modulation — the communication process stops operating.
- cmrsb393a00miollhxpcc7bkzDEPENDS_ON →
Demodulation needs a signal to operate on — it extracts information from a modulated carrier. Remove signals and demodulation ceases to function: there is nothing to demodulate.
- modulationDERIVED_FROM →
Demodulation came after modulation historically — it is the inverse operation filed only because modulation exists first. Which-came-first: modulation predates demodulation as a concept, since demodulation exists solely to reverse modulation.
Relations to this entry
- envelope-detection← INSTANCE_OF
Envelope detection is a type of demodulation: it recovers the original modulating signal from an AM carrier by extracting the amplitude envelope. The mechanism (diode + RC filter) performs demodulation by rectifying and smoothing the carrier.
Record identity
- Created
- Aug 23, 2026, 6:27 PM UTC
- Content hash
- 07c45481b032d446fbe260b6395bb60dfd4e6653c27b0ca813e8a4fadc409acc