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Analog modulation

In analog modulation, the modulation is applied continuously in response to the analog information signal.

Common analog modulation techniques are:

  • Amplitude modulation (AM) (here the amplitude of the modulated signal is varied)
    • Double-sideband modulation (DSB)
      • Double-sideband modulation with unsuppressed carrier (DSB-WC) (used on the AM radio broadcasting band)
      • Double-sideband suppressed-carrier transmission (DSB-SC)
      • Double-sideband reduced carrier transmission (DSB-RC)
    • Single-sideband modulation (SSB, or SSB-AM),
      • SSB with carrier (SSB-WC)
      • SSB suppressed carrier modulation (SSB-SC)
    • Vestigial sideband modulation (VSB, or VSB-AM)
    • Quadrature amplitude modulation (QAM)
  • Angle modulation
    • Frequency modulation (FM) (here the frequency of the modulated signal is varied)
    • Phase modulation (PM) (here the phase shift of the modulated signal is varied)
Q: What is analog modulation?
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Related answers

Analog modulation

In analog modulation, the modulation is applied continuously in response to the analog information signal.

Common analog modulation techniques are:

  • Amplitude modulation (AM) (here the amplitude of the modulated signal is varied)
    • Double-sideband modulation (DSB)
      • Double-sideband modulation with unsuppressed carrier (DSB-WC) (used on the AM radio broadcasting band)
      • Double-sideband suppressed-carrier transmission (DSB-SC)
      • Double-sideband reduced carrier transmission (DSB-RC)
    • Single-sideband modulation (SSB, or SSB-AM),
      • SSB with carrier (SSB-WC)
      • SSB suppressed carrier modulation (SSB-SC)
    • Vestigial sideband modulation (VSB, or VSB-AM)
    • Quadrature amplitude modulation (QAM)
  • Angle modulation
    • Frequency modulation (FM) (here the frequency of the modulated signal is varied)
    • Phase modulation (PM) (here the phase shift of the modulated signal is varied)
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Double-sideband modulation is a type of amplitude modulation where both upper and lower sidebands are present with the carrier signal. The dynamic characteristic of double-sideband modulation is that it allows for efficient use of bandwidth but is susceptible to fading and interference.

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single sideband full carrier

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Suppressed carrier single sideband amplitude modulation - SCSSBAM.

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Single side band suppressed carrier modulation is like amplitude modulation except that one of the sidebands is suppressed or filtered out. Each sideband carries the same though opposite, information, so suppressing the one sideband allows more power to be placed into the one remaining sideband. The downside, of course, is that the demodulation process is more complex.

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