The present code is a Matlab function that provides a measurement of the phase difference between two signals. The measurement is based on Discrete Fourier Transform (DFT) and Maximum Likelihood (ML) estimation of the signals’ initial phases. The method is highly noise resistive.
An example is given in order to clarify the usage of the function. The input and output arguments are given in the beginning of the code.
The code is based on the theory described in:
 M. Sedlacek, M. Krumpholc. “Digital measurement of phase difference – a comparative study of DSP algorithms”. Metrology and Measurement Systems, Vol. XII, No. 4, pp. 427-448, 2005.
 M. Sedlacek. “Digital Measurement of Phase Difference of LF Signals A Comparison of DSP Algorithms”. Proceedings of XVII IMEKO World Congress, pp. 639-644, 2003.
Hristo Zhivomirov (2021). Phase Difference Measurement with Matlab (https://www.mathworks.com/matlabcentral/fileexchange/48025-phase-difference-measurement-with-matlab), MATLAB Central File Exchange. Retrieved .
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