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1 August 2003 High-resolution evaluation algorithms for SAW-identification tags
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The use of surface acoustic wave (SAW) devices is a widely adopted method for implementing unique identification tags that operate completely passively and can be interrogated wirelessly. Interrogation can be done in the time- or frequency-domain, where in the latter case bandwidth is a restraining factor. Conventional signal evaluation is based on the fast Fourier transformation (FFT), which suffers from resolution limitations. Modern model-based frequency estimators have been investigated for SAW ID-tag identification. A state-space algorithm is applied to measured data and compared to FFT evaluation results.
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Andreas Stelzer, Markus Pichler, Stefan Schuster, Stefan Scheiblhofer, and Robert Hauser "High-resolution evaluation algorithms for SAW-identification tags", Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003);

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