Eye Diagram from text file values
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Hello,
I am able to generate a random binary sequence (L = 1023) using Matlab code (a text file example is attached).
I would like to take the generated sequence and plot it such that I see the overlayed data as an eye diagram.
Thank you
2 Comments
Akira Agata
on 12 Jul 2019
Anyway, looking at your data, the 1st column seems to be clean PRBS sequence. So the eye diagram would be pure square shape (assuming NRZ modulation format). Even so, do you want to generate eye diagram of this?
Answers (1)
Akira Agata
on 16 Jul 2019
The following is one simple example.
I hope this would be some help for your research!
% Load PRBS pattern
D = dlmread('PRBS_2^10_01.txt');
bitPattern = D(:,1);
% Generate NRZ (ex. 100 sampling points per bit)
samplePerBit = 100;
sig = repelem(bitPattern,samplePerBit);
% Plot eye diagram of the original signal
timeSlot = 100;
offset = 50;
eyediagram(sig,samplePerBit,timeSlot,offset)
ylim([-0.2 1.2])
% Generate distorted signal (add noise and apply smoothing)
sig2 = sig + 0.2*randn(size(sig));
sig2 = movmean(sig2,50);
% Plot eye diagram of the distorted signal
eyediagram(sig2,samplePerBit,timeSlot,offset)
ylim([-0.2 1.2])
Eye diagram of the original PRBS
Eye diagram of the distorted signal
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