DIGITAL MEASUREMENT OF PHASE DIFFERENCE OF LF SIGNALS – A COMPARISON OF DSP ALGORITHMS
Miloš Sedlácek
Abstract:
The paper compares six methods of measurement of the phase difference of low frequency distorted sinusoidal digitized signals corrupted by additive noise. Influence of SNR, THD, signal DC offset, ADC resolution, ADC range use, and number of samples per signal period can be investigated and presented in graphical form by means of the program written in MATLAB environment. The investigated methods are two modifications of classical zero-crossing based measurement, DFT based measurement, usage of phase-sensitive rectifier and two modifications of sine-wave fit algorithm. Selected results of both simulations and measurements are presented.
Keywords:
DSP in phase measurement, phase measurement accuracy, phase difference of power-line signals
Download:
PWC-2003-TC4-044.pdf
DOI:
-
Event details
Event name:
XVII IMEKO World Congress
Title:

Metrology in the 3rd Millennium

Place:
Dubrovnik, CROATIA
Time:
22 June 2003 - 28 June 2003
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