At least one person in the world has studied from my notes every single day since 2013. This Walsh-Hadamard Transform shortcut is part of that library.
I started sharing my handwritten study notes online as an undergrad in 2013, so others could find them and learn from them. The idea was simple: if you have something useful, put it where people can find it. That idea has not changed.
This is my quick reference shortcut method for Walsh-Hadamard transform calculations, from Digital Signal Processing at BITS Pilani, Dubai Campus. Third year, second semester. DSP is a course where certain calculations need to move fast under exam conditions, and the Walsh-Hadamard transform is one of them. This sheet addresses that directly. It is a short, focused method for doing those calculations when it counts.
The PDF is embedded below. Read it here or download it for later.
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