Stable

Identification of properties of a given FIR filter

Identification of properties of a given FIR filter
  1. How do you know if a FIR filter is stable?

How do you know if a FIR filter is stable?

The necessary and sufficient condition for IIR filters to be stable is that all poles are inside the unit circle. In contrast, FIR filters are always stable because the FIR filters do not have poles. You can determine if pole-zero pairs are close enough to cancel out each other effectively.

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