Adaptive Rate Filtering for a Signal Driven Sampling Scheme

S.-M. Qaisar (1) , Laurent Fesquet (1) , Marc Renaudin (1)

1 TIMA - Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés

This work is a contribution to enhance the signal processing chain required in mobile systems. The system must be low power as it is powered by a battery. Thus a signal driven sampling scheme based on level crossing is employed, adapting the sampling rate and so the system activity by following the input signal variations. In order to filter the non-uniformly sampled signal obtained at the output of this sampling scheme a new adaptive rate FIR filtering approach is de-vised. The idea is to combine the features of both uniform and non-uniform signal processing tools to achieve a smart online filtering process. The computational complexity of the proposed approach is deduced and compared to one of the classical FIR filtering ap-proach. It promises a significant gain of the computational effi-ciency and hence of the processing power.

Mots clés: Level-crossing sampling; asynchronous-design

Domaines: Micro et nanotechnologies/Microélectronique

S.-M. Qaisar, Laurent Fesquet, Marc Renaudin. Adaptive Rate Filtering for a Signal Driven Sampling Scheme. 32nd IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'07), Apr 2007, Honolulu, Hawaï, United States. pp.1465 - 1468, ⟨10.1109/ICASSP.2007.367124⟩. ⟨hal-00174460⟩