Walsh Functions for RMS calculation

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Blue_Electronx

Joined Jun 10, 2019
112
I'm working in an application similar to the one described in the paper attached. Does someone have experience using Walsh Functions for RMS calculation? I think they are not used much in the industry perhaps because they are not so practical (?). I'm using a STM32 microcontroller with no FPU and I need to find RMS of a 50/60 Hz signal like in the paper. Is this a good approach to try or are there better ways?
 

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crutschow

Joined Mar 14, 2008
25,634
How about just taking many samples of the waveform (sample rate high enough to catch the highest frequency of interest in the non-sinusoidal waveform) and then calculate the RMS value from those (square root of the sum of the squares)?
 
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