Question

When an application requires a linear phase filter, it should be an FIR filter.

(a) True

(b) False

This question was addressed to me in unit test.

This intriguing question comes from Design of IIR Filters from Analog Filters topic in chapter Digital Filters Design of Digital Signal Processing

Answer 1

Right answer is (a) True

To explain I would say: The signal processing is computationally cumbersome and appear to offer no advantages over linear phase FIR filters. Consequently, when an application requires a linear phase, it should be an FIR filter.