DSP using MATLAB 示例Example3.22

代码：

% Discrete-time Signal x2(n)
Ts = 0.001; n = -5:1:5; nTs = n*Ts; Fs = 1/Ts; x = exp(-1000*abs(nTs));

% Analog Signal
Dt = 0.00005; t = -0.005:Dt:0.005; 
xa = x * sinc(Fs*(ones(length(n),1)*t - nTs'*ones(1,length(t)))) ;

% check
error = max(abs(xa - exp(-1000*abs(t))))