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The convolution of a signal in time domain can be viewed as __________

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The convolution of a signal in time domain can be viewed as __________

(a) Multiplication in z-domain

(b) Squaring in z-domain

(c) Doubling the signal in z-domain

(d) Convolution in z-domain

This question was posed to me by my school principal while I was bunking the class.

The query is from Z Transform topic in division Digital Signal Processing of MATLAB

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Right option is (a) Multiplication in z-domain

Easy explanation: This is observed from the fact that a signal can be represented as a summation of impulses and while we perform convolution in a time domain, we can represent the entire output in the form of z^-n.

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