Simultaneous sampling by digital phase correction

Abstract

Phase correction by digital filtering is a common approach to achieve simultaneous sampling with no additional hardware. In this paper we obtain a bound for the interpolation error as a function of the oversampling ratio of the input signal and the interpolation filter order. This bound can be used to analyze and design simultaneous sampling systems by digital phase correction. The obtained theoretical results are validated through simulation. Finally, a vibration analysis system using this technique is described.