plural of frequency modulation

plural of phase modulation

(electronics) A signal processing function in which two signals (typically a complex signal and a less complex carrier such as a sine wave) are combined to yield an output.

plural of ring modulation

(radio) A modification of amplitude modulation that modulates the output signal on a single sideband only, as opposed to both sidebands.

(radio) A modulation scheme that conveys data by applying amplitude modulation to two carrier waves at once. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers. Commonly abbreviated QAM.

plural of quadrature amplitude modulation

plural of single-sideband modulation