Eye Diagram Density Plot

Actively maintained. An eye diagram plotting tool. Raster plots eye diagram density, has arguments for auto labeling, and histograms.

EyeDiagram

Better eye diagram generation code in MATLAB. Used a lot in my DPhil Thesis.

How much better?

A before and after is provided here:

Unlike MATLAB's built in eyediagram() function, the more data you provide eyediagram_dense() the prettier it looks, case in point (for a different communications system with a higher error rate):

What does your code do? eyediagram_dense creates a raster image of an eye diagram, capturing signal density at each point on the image. This function creates a diagram, alongside returning all the important information captured within it as a MATLAB struct.

eyediagram_dense() also has the ability to detect zero crossings, and automatically label the x axis accordingly.

I mainly work with On-Off Keying, so for the y axis the system is able to detect two levels. In a future update I will be able to detect PAM.

With optional arguments, histograms can be placed along the x and y axis, for zero crossing distributions (a way to test if you have double-Dirac) and to sanity check your bit levels.

What is coming next? My goals for this repo are as follows:

Goal	Description
Q factor estimation	From the eye diagram we can estimate Q factors, which are important quantities to know for any communications system.
BER estimation	From calculated Q factors we can estimate the BER. This is handy if we don't have all afternoon to resolve a 10^-12 BER.
Eye Opening Metrics	Use standard textbook metrics and return to the user.
Jitter	Quantify the jitter and return it to the user.
Colormaps	Add colormaps for custom eye diagram output
More...	I'm sure I've missed lots, but more eye diagram related features will be included