What are the steps to reproduce the plots in 5G New Radio Polar Coding example?

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Zakir Hussain Shaik
Zakir Hussain Shaik 2022-10-19
编辑： Zakir Hussain Shaik 2022-10-24
The plot presented as an example for 5G New Radio Polar Coding in the following link:
https://se.mathworks.com/help/5g/gs/polar-coding.html
states that the results were produced by encapsulating the code presented in that page into a function that supports C-code generation.
I would like to know what were the intermediary steps that were used. Is it that C-code was generated and it is called in MATLAB or the code was run in C and saved data is used in MATLAB to plot it?
In my work as well I most often do simulations to produce BER plots, I would like to adopt similar methodology, so that I can speed up the executions. It would be helpful if someone puts in steps that can recreate the plots in that example using C-code generation.

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采纳的回答

Konstantinos Athanasiou
A fitting workflow to speed up the execution time of this example (and produce similar plots quickly) could be:
1. Encapsulate the code into a function for code generation by puting the script's code in a function, say:
function bler = computeBLER
% the script's code here
bler = numferr/numFrames;
end
2. Use MATLAB coder and its codegen function (https://www.mathworks.com/help/coder/generating-code.html) to generate the MEX function computeBLER_mex
>> codegen computeBLER
3. Call computeBLER_mex from other matlab scripts/function to gather the results and plot them as needed.
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Zakir Hussain Shaik
Zakir Hussain Shaik 2022-10-20
编辑：Zakir Hussain Shaik 2022-10-20
Thank you for your quick response and for telling me the workflow required. I have tried following the steps stated for the polar coding example. But I get runtime issues with nrPolarDecode() function. On the other hand there seems no problem with nrPolarEncode().
I have attached the function file
  • computepolarcodeBLER.m for c code generation
  • Example1.m which calles the above function. This example runs without any issue. However, mex generation of the function has issues.
Can you let me know how to circumvent this issue? I don't have control over that function as that is an inbuilt function, and the documentation of the function https://se.mathworks.com/help/5g/ref/nrpolardecode.html states it supports C/C++ code generation. I am using MATLAB 2021b version.
Thanks,
Zakir
Zakir Hussain Shaik
Zakir Hussain Shaik 2022-10-20
编辑：Zakir Hussain Shaik 2022-10-24
I have now put up all the variables except K, E and SNR for the above example within the function itself instead of being them as a varying parameters. Seems now that is working. I have now able to create a mex file and use it in the example code.
Thanks for the help.
Regards,
Zakir

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