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Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

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Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

(a) Hamming window

(b) Hanning window

(c) Kaiser window

(d) Blackman window

The question was posed to me during an online interview.

Enquiry is from Design of Linear Phase FIR Filters Using Windows in division Digital Filters Design of Digital Signal Processing

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The correct option is (c) Kaiser window

The explanation is: The frequency response shown in the figure is the frequency response of a low pass filter designed using a Kaiser window of length M=61 and α=4.

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