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When the frequency band is selected, we can specify the sampling rate and the characteristics of the pre-filter, which is also called as

When the frequency band is selected, we can specify the sampling rate and the characteristics of the pre-filter, which is also called as Correct Answer anti-aliasing filter

Anti-Aliasing Filter:

  • An anti-aliasing filter (AAF) is a filter used before a signal sampler to restrict the bandwidth of a signal.
  • It blocks the higher frequency contents in a signal to restrict it to a maximum frequency.
  • Anti-aliasing filters are commonly used at the input of the digital signal processing system's analog-to-digital converter.

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Aliasing is explained with the help of the spectrum as shown:

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