A basic question: How to using eyeDiagramSI function?
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How to using eyeDiagramSI function to plot a eyedigram for 10Gbps@PRBS15 singal of BIN format?
Refer to below code, seems not working.
samplesPerSymbol = 16;
symbolTime = 100e-12;
sampleInterval = symbolTime / samplesPerSymbol;
modulation = 2;
eyeDiagram = eyeDiagramSI;
eyeDiagram.SampleInterval = sampleInterval;
eyeDiagram.SymbolTime = symbolTime;
eyeDiagram.Modulation = modulation;
回答（1 个）
Avni Agrawal
2025-4-2
I understand that you are trying to plot an eye diagram for a 10 Gbps PRBS15 signal using the `eyeDiagramSI` function in MATLAB, you need to ensure that you have the required toolboxes and that your setup is correct.
Required Toolbox: Signal Integrity Toolbox
- The `eyeDiagramSI` function is part of this toolbox.
Steps to Plot the Eye Diagram
- Ensure Toolboxes are Installed: Verify that the Signal Integrity Toolbox is installed. You can check this in MATLAB using the `ver` command.
- Set Up the Eye Diagram: Define the parameters for your signal. Ensure that the parameters match your signal's characteristics.
- Use the `eyeDiagramSI` System Object: Create and configure the `eyeDiagramSI` object with the appropriate properties.
Here is a corrected version of the code:
% Define parameters
samplesPerSymbol = 16; % Number of samples per symbol
symbolTime = 100e-12; % Symbol time for 10 Gbps
sampleInterval = symbolTime / samplesPerSymbol; % Sample interval
modulation = 2; % Binary modulation
% Create the eye diagram object
eyeDiagram = eyeDiagramSI('SampleInterval', sampleInterval, ...
'SymbolTime', symbolTime, ...
'Modulation', modulation);
% Generate a PRBS15 signal (example)
prbs15Signal = prbs(15, 'Order', samplesPerSymbol * 1000); % Adjust length as needed
% Plot the eye diagram
step(eyeDiagram, prbs15Signal);
Additional Notes
- PRBS Signal: Ensure correct generation, possibly using the `prbs` function from the Communications Toolbox.
- Syntax: Verify correct usage of the `eyeDiagramSI` object.
- Documentation: See the Eye Diagram System Object Documentation: https://www.mathworks.com/help/signal-integrity/ref/eyediagramsi-system-object.html for details.
If you encounter issues, make sure to check for errors in the MATLAB command window and ensure all necessary toolboxes are installed and licensed.
I hope this helps!
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