A CT periodic signal sampled at different frequencies
It is known that y=cos(x) in CT is a periodic function, and this periodic CT function was sampled at different frequencies in DT.
%%%%%%%%DT input%%%%%%%%% n=1:1:40 y=cos(pi/8*n); figure(1) plot(n,y) y2=cos(3*n); figure(2) plot(n,y2)
FIGURE(1) shows a periodic DT graph
FIGURE(2) not a periodic graph
Making periodic signal by shifting and summing aperiodic signals
I used y=t signal to shift and make periodic signal.
t=[0:0.1:5] t1=[5:0.1:10] t2=[10:0.1:15] y=t hold on plot(t,y) y1=(t) plot(t1,y1) y2=(t) plot(t2,y2) hold off