Suppose you periodically receive samples of a periodic waveform at fixed instances in time Δt. It is known ahead of time that the periodic waveform will have a fundamental frequency component of 50Hz or 60Hz, but perhaps with some higher order harmonics present.(adsbygoogle = window.adsbygoogle || []).push({});

What is the easiest way to go about determining the peak value of the fundamental frequency component of the waveform from the samples?

I suppose by buffering a number of samples and preforming a DFT one could retrieve the fundamental frequency component, and from there I could use a low pass filter with a large time constant to recover the peak value.

Is there an easier way?

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# Determining the Fundamental Frequency Component

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