Q:

What is a circular or cyclic convolution?

A) Convolution of a periodic and continuous time function B) Convolution of a periodic and discrete time function
C) Superposition of periodic and periodic function D) Summation of continuous time and a convolution of a periodic function convolution
 
Answer & Explanation Answer: D) Summation of continuous time and a convolution of a periodic function convolution

Explanation: The circular convolution is done of two aperiodic functions (i.e. Schwartz functions) happens when one of them is convolved in the normal way with a periodic summation of the other given function.
(Xn*h)[n]=?h[m].xn[n-m], for discrete sequences n.

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