Wireless Technology Terms, Glossary and Dictionary

QAM: Quadrature Amplitude Modulation

Quadrature Amplitude Modulation (QAM) is a type of modulation where the signalling information is carried in the phase and amplitude of the modulated carrier wave. Specifically for QAM, the amplitude of two waves, 90 degrees out-of-phase with each other (in quadrature) are changed (modulated or keyed) to represent the data signal, in which each combination of phase and amplitude represents one of sixteen four-bit patterns.

Related Terms

QAM: Quadrature Amplitude Modulation