A Method for Precise RMS Measurements of Periodic Signals by Reconstruction Technique With Correction

In this paper, a method for precise rms measurement of periodic signals based on signal reconstruction is presented. Reconstruction is performed in two steps. In the first step, the Fourier coefficients are estimated from integrative samples, and in the second step, using the method of least squares and precision measurement of rectified-signal average, the estimators are corrected. It is shown that this approach considerably increases accuracy of the rms measurements of low-frequency signals