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please let me know reference of this MATLAB code. please explain this code line by line. . . N=256;...

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Electrical Engineering

please let me know reference of this MATLAB code.

please explain this code line by line.

.

.

N=256; %% sampling number

n=linspace(0,1,N);

fs=1/(n(2)-n(1));

x=5*(sin((2*pi*10*n))); %% create signal


N=length(x);

f=[-fs/2:fs/N:fs/2-fs/N];

subplot(211)

plot(f,fftshift(abs(fft(x))));

title('|G(f)|');grid;

xlabel('frequency');

ylabel('|G(f)|');

%Zero padding

xx=[zeros(1,128) x zeros(1,128)];

N=length(xx);

f=[-fs/2:fs/N:fs/2-fs/N];

subplot(212)

plot(f,fftshift(abs(fft(xx))));

title('|Gz(f)|');grid;

xlabel('frequency');

ylabel('|Gz(f)|');

Answer & Explanation Solved by verified expert
4.1 Ratings (800 Votes)
This code is see the effect of padding zeros in the signal Itincreases the Resolution of the fftI have added comments to each line of code for yourunderstandingN256 The number of samples taken for xnnlinspace01N creating the    See Answer
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