Question

Which of the following is the correct expression for transition band Δf?

(a) (ωp– ωs)/2π

(b) (ωp+ωs)/2π

(c) (ωp.ωs)/2π

(d) (ωs– ωp)/2π

This question was addressed to me in an international level competition.

I'm obligated to ask this question of Comparison of Design Methods for Linear Phase FIR Filters topic in chapter Digital Filters Design of Digital Signal Processing

Answer 1

The correct option is (d) (ωs– ωp)/2π

The best I can explain: The expression for Δf i.e., for the transition band is given as

Δf=(ωs-ωp)/2π.