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词汇 quadrature amplitude modulation
释义

Definition of quadrature amplitude modulation in English:

quadrature amplitude modulation

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

    〔电信〕正交调幅

    Example sentencesExamples
    • A quadrature amplitude modulation trellis coded modulation decoder for decoding a stream of QAM TCM signals is disclosed.
    • To avoid these problems, HomePlug uses a robust orthogonal frequency division multiplexing scheme with 1,280 orthogonal quadrature amplitude modulation carriers.
    • 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.

Definition of quadrature amplitude modulation in US English:

quadrature amplitude modulation

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

    〔电信〕正交调幅

    Example sentencesExamples
    • To avoid these problems, HomePlug uses a robust orthogonal frequency division multiplexing scheme with 1,280 orthogonal quadrature amplitude modulation carriers.
    • 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.
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