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School of Electronic Information and Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China





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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





Autor: Boquan Liu, Chenrui Zhang, Xiaojun Ji, Jing Chen and Tao Han *

Fuente: http://mdpi.com/



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