Plotting a time domain Signal

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Abdelrhman Abdelfatah 2022-5-24

回答： Chunru 2022-5-24

I want to plot the continuous time domain signal for the following spectrum:

and here is what i have done so far, are there any possible improvments to this?

N=256;
xn=zeros(1,N);
for n=0:1:N-1
    xn(n+1)= 2*(sign(n - -1) - sign(n - 1));
end
%Taking inverse DFT
x_i=ifft(xn);
wk = 0:1:N-1;
plot(wk,x_i);

Chunru 2022-5-24

N=256;

f=(0:N-1)/N;

xf = 2*sinc(2*f); % 2*sin(w)/w => 2*sinc(2*f)

x_i=ifft(xf);

plot(f, real(x_i), 'r', f, imag(x_i), 'b');

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