Double sideband modulation

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  • Quadrature amplitude modulation

    Quadrature amplitude modulation

    Quadrature amplitude modulation (QAM) (pronounced /ˈkwɑːm/ or /ˈkæm/ or simply "Q-A-M") is both an analog and a digital modulation scheme. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift...
  • Single-sideband modulation

    Single-sideband modulation

    Single-sideband modulation (SSB) is a refinement of amplitude modulation that more efficiently uses electrical power and bandwidth. It is closely related to vestigial sideband modulation (VSB) (see below). Amplitude modulation produces a modulated output signal that has twice the bandwidth of the...

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