Question 1 Use MATLAB to find, and to graph. the unit-sequence response of the system displayed below.
Question 2 A periodic signal x(t) with a fundamental period of 2 seconds is described over one fundamental period by
Graph the signal. Then, graph on the same scale the signal xN(t) given by
For N = 10, 20 and 30 (In each case the time scale of the graph should cover at least two fundamental periods of the original signal).
Question 3 A signal is defined by x[n] = sinc(n/8). Graph the magnitude and phase of the DTFT of x[n - 2].