Simultaneous gain, drift and offset estimation in measurement systems using coherent sampling

Leis, John (2013) Simultaneous gain, drift and offset estimation in measurement systems using coherent sampling. In: 7th International Conference on Signal Processing and Communication Systems (ICSPCS 2013), 16-18 Dec 2013, Gold Coast, Australia.

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Abstract

In instrumentation and measurement systems, external noise is often a significant problem. The particular signal processing techniques employed to enable such measurements depend somewhat on the nature of the problem at hand, what is able to be measured, and other factors. Techniques such as coherent averaging and synchronous detection take advantage of situations where a time-synchronous signal is available. A problem which may prevent successful application of these methods is the presence of slowly-changing drift, which is inevitably associated with many types of sensors. In this paper, a novel technique is proposed to estimate the measured signal amplitude using a matrix representation of coherently sampled repetitive measurement sweeps. It is also shown how the technique may be extended using partitioning of the signal matrix to account for both sensor offset and linear time drift. The method is able to simultaneously produce good estimates of the signal amplitude, drift and offset. Results demonstrate that the technique is promising when applied in situations where sensor drift precludes the normal application of synchronous detection.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: No
Item Status: Live Archive
Additional Information: Copyright 2013 IEEE. Published version restricted in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 05 Mar 2014 04:29
Last Modified: 21 Jul 2017 01:05
Uncontrolled Keywords: signal processing; measurement; noise; sensors
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090603 Industrial Electronics
09 Engineering > 0906 Electrical and Electronic Engineering > 090609 Signal Processing
09 Engineering > 0906 Electrical and Electronic Engineering > 090601 Circuits and Systems
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8615 Instrumentation > 861501 Industrial Instruments
Identification Number or DOI: 10.1109/ICSPCS.2013.6723972
URI: http://eprints.usq.edu.au/id/eprint/24061

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