MATLAB Code for Sampling of Signal

MATLAB Code for Sampling of Signal 



%%%%%%%%%%% START %%%%%%%%%%%%%%%
clc;
% Analog Signal
 Dt = 0.00005; 
 t = -0.005:Dt:0.005; 
 xa = exp(-1000*abs(t));
% Discrete-time Signal
 Ts = 0.0002; n = -25:1:25; x = exp(-1000*abs(n*Ts));
% Discrete-time Fourier transform
 K = 500; k = 0:1:K; w = pi*k/K;
 X = x * exp(-j*n'*w); X = real(X);
 w = [-fliplr(w), w(2:K+1)];
 X = [fliplr(X), X(2:K+1)];
 subplot(1,1,1)
 subplot(2,1,1);plot(t*1000,xa) ;
 xlabel('t in msec.'); ylabel('x1(n)')
 title('Diacrete Signal'); hold on
 stem(n*Ts*1000,x);  
 subplot(2,1,2);plot(w/pi,X);
 xlabel('Frequency in pi units'); ylabel('Xl(w)')
 title('Discrete-time Fourier Transform')

%%%%%%%%%%% END %%%%%%%%%%%%%%%

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