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Вопрос 410

What type of digital signal processing filter is used to generate an SSB signal?

  1. An adaptive filter
  2. A notch filter
  3. A Hilbert-transform filterПравильный ответ
  4. An elliptical filter

Объяснение

Generating SSB by the phasing method requires a copy of the audio shifted by 90 degrees at every frequency across the passband. A Hilbert-transform filter performs exactly that wideband quadrature shift in the digital domain.

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Вопрос 410: What type of digital signal processing filter is used to… · FCC Amateur Extra Class (Element 4) · Questena