TY - JOUR N2 - In this paper, two new sinusoidal signal frequency estimators calculated on the basis of four equally spaced signal samples are presented. These estimators are called four-point estimators. Simulation and experimental research consisting in signal frequency estimation using the invented estimators have been carried out. Simulation has also been performed for frequency tracking. The simulation research was carried out applying the MathCAD computer program that determined samples of a sinusoidal signal disturbed by Gaussian noise. In the experimental research, sinusoidal signal samples were obtained by means of a National Instruments PCI-6024E data acquisition card and an Agilent 33220A function generator. On the basis of the collected samples, the values of four-point estimators invented by the authors and, for comparison, the values of three- and four-point estimators proposed by Vizireanu were determined. Next, estimation errors of the signal frequency were determined. It has been shown that the invented estimators can estimate a signal frequency with greater accuracy. L1 - http://www.czasopisma.pan.pl/Content/104027/PDF/art08.pdf L2 - http://www.czasopisma.pan.pl/Content/104027 PY - 2018 IS - No 2 DO - 10.24425/119561 KW - sinusoidal signal KW - frequency estimation KW - frequency tracking A1 - Sienkowski, Sergiusz A1 - Krajewski, Mariusz PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 25 DA - 2018.06.15 T1 - Simple, fast and accurate four-point estimators of sinusoidal signal frequency UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/104027 T2 - Metrology and Measurement Systems ER -