Experimental Characterization And Modeling Of Low-Cost Oscillators For Improved Carrier Phase Synchronization
2017 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE (I2MTC)(2017)
Abstract
Phase noise performance is measured for nine different crystal oscillators, each suitable for use as a frequency reference in applications such as software defined radio and coherent cooperative communication systems. The phase noise measurements are parametrically fit to a standard two-state oscillator model to characterize the short-term and long-term stability parameters of each oscillator. A three-state model is also developed to provide a better fit to the measured phase noise spectrum for some of the tested references. In addition to providing a better fit to the measured phase noise spectra, the three-state model enables improved phase estimation and prediction performance. A numerical example is presented in which a Kalman filter derived from the three-state model shows up to 3 dB improvement in mean squared error compared with the two-state model.
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Key words
mean squared error model,Kalman filter,improved carrier phase synchronization,crystal oscillator,software defined radio,coherent cooperative communication system,phase noise spectrum measurement,standard two-state oscillator model,short-term stability parameter,long-term stability parameter,three-state model,phase estimation,prediction performance
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