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Basic Send-on-Delta Sampling for Signal Tracking-Error Reduction

by 1,*,†,‡, 2,†,‡, 2,†,‡ and 2,†,‡
School of Computer Engineering, Campus de Ourense, Edificio Politecnico, 32004 Ourense, Spain
School of Industrial Engineering, Campus Lagoas-Marcosende, 36310 Vigo, Spain
Author to whom correspondence should be addressed.
Systems Engineering and Automation, University of Vigo, 36310 Vigo, Spain.
These authors contributed equally to this work.
Academic Editor: Yu Hen Hu
Sensors 2017, 17(2), 312;
Received: 12 December 2016 / Revised: 21 January 2017 / Accepted: 3 February 2017 / Published: 8 February 2017
(This article belongs to the Section Sensor Networks)
This paper investigates the dynamic selection of an appropriate threshold for basic Send-on-Delta (SoD) sampling strategies, given an available transmission rate to reduce the signal tracking-error. The paper formulates the error-reduction principle and proposes an algorithm that calculates, in real time, the amplitude threshold value (also called delta value) for a desired mean transmission rate. The algorithm is implemented to be computed in a Send-on-Delta driver and is tested with three signals that match the step response of a second order control system. Comparison results with a conformant periodic transmission strategy reveals that it improves deeply the tracking-error while maintaining the desired average throughput. View Full-Text
Keywords: Send-on-Delta; deadband; tracking error; networks Send-on-Delta; deadband; tracking error; networks
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MDPI and ACS Style

Diaz-Cacho, M.; Delgado, E.; Barreiro, A.; Falcón, P. Basic Send-on-Delta Sampling for Signal Tracking-Error Reduction. Sensors 2017, 17, 312.

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