Title :
Simultaneous sampling by digital phase correction
Author :
Luengo-García, David ; Pantaleón-Prieto, Carlos ; Santamaría-Caballero, Ignacio ; Ibanez-Díaz, Jesus ; Gómez-Cosío, Enrique
Author_Institution :
Dpto. Ingenieria de Commun., Cantabria Univ., Santander, Spain
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
Keywords :
error analysis; filtering theory; interpolation; signal sampling; vibration measurement; digital filtering; digital phase correction; interpolation error; interpolation filter; multichannel acquisition; oversampling ratio; phase compensation; simulation; simultaneous sampling; vibration analysis; Data acquisition; Delay; Digital filters; Equations; Hardware; Interpolation; Performance analysis; Phase distortion; Sampling methods; Signal resolution;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.610287
