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The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.

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The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.

(a) True

(b) False

This question was addressed to me during an online interview.

Query is from Design of FIR Filters topic in section Digital Filters Design of Digital Signal Processing

1 Answer

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Right answer is (a) True

Easy explanation: We can express the output sequence as the convolution of the unit sample response h(n) of the system with the input signal. The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.

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