Question

How is discrete time convolution represented?

(a) x[n] + h[n]

(b) x[n] – h[n]

(c) x[n] * h[n]

(d) x[n] + h[n]

This question was posed to me during an interview.

My question is taken from Discrete Time Convolution in portion Time-Domain Analysis of CT Systems of Signals and Systems

Answer 1

The correct answer is (c) x[n] * h[n]

For explanation: Discrete time convolution is represented by x[n]*h[n]. Here x[n] is the input and h[n] is the impulse response.