Linear phase FIR filters have ______  group and phase delay responses.

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BDL MT Electrical 17 April 2022 Official Paper
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  1. Low
  2. Constant
  3. Moderate
  4. High

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Option 2 : Constant
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Finite Impulse Response (FIR) filter

  • In signal processing, a finite impulse response (FIR) filter is a filter whose impulse response is of finite duration because it settles to zero in finite time.
  • FIR filters can be discrete-time or continuous-time, and digital or analog.
  • The impulse response of an Nth-order discrete-time FIR filter has exactly N+1 samples.
  • For a linear-phase filter, group delay and phase delay are of the same value. So linear-phase filters are also called Constant Time Delay Filters.
  • An FIR filter is a linear phase if its coefficients are symmetrical or anti-symmetrical around the center coefficient.
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