Question

Which of the following windows has a time domain sequence h(n)=\(1-\frac{2|n-\frac{M-1}{2}|}{M-1}\)?

(a) Bartlett window

(b) Blackman window

(c) Hanning window

(d) Hamming window

The question was posed to me in an online interview.

This interesting question is from Design of Linear Phase FIR Filters Using Windows in portion Digital Filters Design of Digital Signal Processing

Answer 1

The correct option is (a) Bartlett window

Explanation: The Bartlett window which is also called as triangular window has a time domain sequence as

h(n)=\(1-\frac{2|n-\frac{M-1}{2}|}{M-1}\), 0≤n≤M-1.