Fluctuation-Enhanced Sensing With Zero-Crossing Analysis for High-Speed and Low-Power Applications

Zoltan Gingl, Laszlo B. Kish, Bulent Ayhan, Chiman Kwan, Claes-Göran Granqvist
2010 IEEE Sensors Journal  
A new method to generate fingerprints of agents has been introduced. The method is based on using the zero crossing statistics at fluctuation-enhanced sensing. It is a new version of Ben Kedem's original method based on low-pass filters. To improve computation time and energy efficiency, highpass filtering is used and in doing that in the simplest possible way, local zero levels for short-time sub-windows are defined and a zero crossing counting by the use of such windows is carried out. The
more » ... carried out. The method turns out to be an effective tool to identify noise processes with different spectra or amplitude distribution, with at least 1000 times less calculation and correspondingly lower energy need than that of the Kedem or the FFT methods. We demonstrate the usability of the method by the analysis and recognition of different stochastic processes with similar and different spectra. Index Terms-zero crossing, high speed, low power, fluctuation enhanced sensing
doi:10.1109/jsen.2009.2037348 fatcat:w7z4dhe4gvbjxeumwm22cuetei