controlled carrier modulation [kǝn¦trōld `kar·ē·ǝr ´mäj·ǝ`lā·shǝn] COMMUNICATIONS System of modulation wherein the carrier is amplitude-modulated by the signal frequencies and, in addition, the carrier is amplitude-modulated according to the envelope of the signal so that the modulation factor remains constant regardless of the amplitude of the signal. Also known as floating carrier modulation; variable carrier modulation. |