APPARATUS AND METHOD FOR PHASOR ESTIMATION

摘要

PURPOSE: A pager measurement system and a method thereof capable of accurately measuring a phasor regardless of the variation of frequency are provided to reduce danger by the variation of sample extraction frequency. CONSTITUTION: An A/D converter(41) converts inputted analog voltage or current into the digital signal. An interpolator(42) interpolates the digital signal of the A/D converter. An orthogonal converter(43) separates the digital signal interpolated in an interpolator to the component signals. A pager measuring unit measures the pager of the input signal by using the cosine signal and the sine signal extracted from the orthogonal converter. A frequency measurement unit measures the frequency of the input signal by using the cosine signal and the sine signal extracted from the orthogonal converter.