Optimized signal processing for FMCW interrogated reflective delay line-type SAW sensors

Ville Viikari, Kimmo Kokkonen, Johanna Meltaus

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5 Citations (Scopus)


This correspondence presents an optimized frequency modulated continuous-wave (FMCW) interrogation procedure for reflective delay line-type SAW sensors. In this method, the time delays between reflections are obtained with Fourier transform from optimally windowed frequency response. Optimal window functions maximize the signal-to-interference ratio at chosen temporal points of interest. The method is experimentally verified and its accuracy is compared with that of a Fourier transform from Hamming-windowed frequency response.
Original languageEnglish
Pages (from-to)2522-2526
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Issue number11
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed



  • Fourier transforms
  • radio frequency identification (RFID)
  • surface acoustic waves
  • wireless sensor

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