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IIR digital filtering of non-uniformly sampled signals via state representation

Auteur(s) : L. Fesquet, B. Bidegaray-Fesquet

Journal : International Journal of Signal Processing

Volume : 90, n°10

Pages : 2811-2821

Doi : 10.1016/j.sigpro.2010.03.030

This article describes a new kind of processing chain based on a non-uniform sampling scheme provided by a level-crossing ADC. The chain implements IIR filters which process directly the non-uniform samples without resampling in a regular scheme. The non-uniformity in the sample times leads to choose a state representation for the filters. The stability is studied and the performances of various numerical schemes used to implement the filters in this representation are compared.