Quadrature modulation in which the two carriers are amplitude modulated.

As the name itself states QAM results from two carriers in quadrature (QAM is a combination of ASK and PSK). A "n" level digital signal is superimposed on them.

A modulation technique used by modems and DSL equipment in which a carrier's amplitude and phase are simultaneously modulated by the digital traffic.

Modulation standard used for cable transmission.

A variation of PSK that incorporates AM to increase the number of bits per baud.

A modulation method used by cable DTV that combines changes in phase and amplitude to send four bits with each baud. Quadrature phase shift keying (QPSK) A modulation method used by satellite DTV that transmits information by varying the phase of a sine wave.

(QAM) - Digital modulation format where information is conveyed in the amplitude and phase of a carrier signal.

(QAM): A coding technique that uses many discrete digital levels to transmit data with minimum bandwidth. 256QAM uses 16 discrete amplitude levels and 16 phase shift levels to transmit digitized video.

A data-encoding technique used by modems operating at 2400 bits per second or faster. Quadrature amplitude modulation is a combination of phase and amplitude change that can encode multiple bits on ... more