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If the value of M increases then the main lobe in the frequency response of the rectangular window becomes broader.

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If the value of M increases then the main lobe in the frequency response of the rectangular window becomes broader.

(a) True

(b) False

I got this question by my college professor while I was bunking the class.

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

1 Answer

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Right choice is (b) False

To elaborate: Since the width of the main lobe is inversely proportional to the value of M, if the value of M increases then the main lobe becomes narrower.

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