Journal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Volume 51, Issue 12, Pages 3182-3190Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2003.819004
Keywords
Adams methods; dynamic power management; interpolation; low-power; variable-rate sampling
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A method for variable-rate data sampling is proposed for the purpose of low-power data acquisition in a-small footprint microsystem. The procedure enables energy saving by utilizing dynamic power management techniques and is based on the Adams-Bashforth and Adams-Moulton multistep predictor-corrector methods for ordinary differential equations. Newton-Gregory backward difference interpolation formulae and past value substitution are used to facilitate sample rate changes. It is necessary to store only 2m + 1 equispaced past values of t and the corresponding values of y, where y = g(t), and m is the number of steps in the Adams methods. For the purposes of demonstrating the technique, fourth-order methods are used, but it is possible to use higher orders to improve accuracy if required.
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