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Sensors 2014, 14(12), 22261-22273; doi:10.3390/s141222261

An Improved Performance Frequency Estimation Algorithm for Passive Wireless SAW Resonant Sensors

School of Electronic Information and Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Author to whom correspondence should be addressed.
Received: 23 September 2014 / Revised: 11 November 2014 / Accepted: 13 November 2014 / Published: 25 November 2014
(This article belongs to the Special Issue Resonant Sensors and Sensor Fusion)
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Abstract

Passive wireless surface acoustic wave (SAW) resonant sensors are suitable for applications in harsh environments. The traditional SAW resonant sensor system requires, however, Fourier transformation (FT) which has a resolution restriction and decreases the accuracy. In order to improve the accuracy and resolution of the measurement, the singular value decomposition (SVD)-based frequency estimation algorithm is applied for wireless SAW resonant sensor responses, which is a combination of a single tone undamped and damped sinusoid signal with the same frequency. Compared with the FT algorithm, the accuracy and the resolution of the method used in the self-developed wireless SAW resonant sensor system are validated. View Full-Text
Keywords: wireless SAW sensors; singular value decomposition; frequency estimation wireless SAW sensors; singular value decomposition; frequency estimation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Liu, B.; Zhang, C.; Ji, X.; Chen, J.; Han, T. An Improved Performance Frequency Estimation Algorithm for Passive Wireless SAW Resonant Sensors. Sensors 2014, 14, 22261-22273.

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