Q.

The convolution of a discrete signal with itself is                    

A. squaring the signal
B. doubling the signal
C. adding two signals
D. is not possible
Answer» A. squaring the signal
Explanation: this is proved by the fact that since discrete signals can be thought of as a one variable polynomial with the coefficients, along with the order, representing the amplitude, at an instant equal to the order of the variable, of the signal- they are simply multiplied during convolution.
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