Sampling and Reconstruction of Analog Signals

Example 5a
• Reconstruct signal from the samples in example 2 using ZOH
interpolation
• It is a crude one and the further processing of analog signal is
neccessary
1
Reconstructed Signal from x1(n) using zero-order-hold
Ts = 0.0002; n = -25:1:25; nTs = n*Ts;
x = exp(-1000*abs(nTs));
% Analog Signal reconstruction using stairs
stairs(nTs*1000,x);
xlabel('t in msec.'); ylabel('xa(t)')
stem(n*Ts*1000,x); hold off
xa(t)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-5 -4 -3 -2 -1 0 1 2 3 4 5
t in msec.