phase modulation

(redirected from p-m)
Also found in: Thesaurus, Medical, Financial, Encyclopedia.

phase modulation

n. Abbr. pm or p-m
A method of signal transmission in which the phase of a carrier wave is varied to transmit information contained in the signal.

phase modulation

n
(Electronics) a type of modulation, used in communication systems, in which the phase of a radio carrier wave is varied by an amount proportional to the instantaneous amplitude of the modulating signal

phase′ modula`tion



n.
radio transmission in which the carrier wave is modulated by changing its phase to transmit the amplitude and pitch of the signal.
[1925–30]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phase modulation - modulation of the phase of the carrier wave
modulation - (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase