Beating MatLab's Convolution Function conv.m for Long Real Sequences!

This submission contains three fast convolution functions suitable for real signals only.


Updated 24 Mar 2015

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Fast convolution is a primary goal in real-time DSP applications. Here I provide three custon convolution computation functions, suitable for real signals only. Quite remarkably, they outperform MatLab's built-in conv.m function when the length of both sequences is greater than 2^12! I also provide a benchmarking script and some figures of my results. Even more suprisingly, there is no coding in a lower level language like C or assembly. Therefore great room for further speed improvements exists!

Cite As

Ilias Konsoulas (2023). Beating MatLab's Convolution Function conv.m for Long Real Sequences! (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011b
Compatible with any release
Platform Compatibility
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Version Published Release Notes

I have improved the fastconvrealDFT.m file. Now it takes advantage the special structure of the intermediate signal Z for faster execution. Since it corresponds to a real-signal DFT, I now use the ifftreal.m function.

I included the custom function my_DHT.m which was inadvertently omitted in the initial .zip file.