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The convolution of a discrete signal with itself is _________(a) Squaring the signal(b) Doubling the signal(c) Adding two signals(d) is not possibleI have been asked this question by my school teacher while I was bunking the class.Query is from Convolution in section Digital Signal Processing of MATLAB

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Correct OPTION is (a) Squaring the signal

Easiest 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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