Definition of quadrature amplitude modulation in English:

quadrature amplitude modulation

noun

Telecommunications
  • A modulation system used in microwave and satellite communication, involving phase and amplitude modulation of a carrier wave.

    • ‘A quadrature amplitude modulation trellis coded modulation decoder for decoding a stream of QAM TCM signals is disclosed.’
    • ‘Because Ultraband utilizes ITU-grade QAM (quadrature amplitude modulation), it requires lower plant noise floors.’
    • ‘An SCM modulator uses the digital component to create a low-order QAM (quadrature amplitude modulation) symbol.’
    • ‘To avoid these problems, HomePlug uses a robust orthogonal frequency division multiplexing scheme with 1,280 orthogonal quadrature amplitude modulation carriers.’