Maximum-likelihood estimation for passive wireless intermodulation communication sensors

Jinsong Song, Jussi Salmi, Ville V. Viikari, Nadine M.P. Pesonen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)


The intermodulation communication principle has recently shown several advantages over other passive wireless sensor readout techniques. The advantages include a large readout distance and the possibility of using generic sensor elements. In this paper, we derive an algorithm to estimate the quantity measured by the wireless sensor from its intermodulation response and verify the algorithm experimentally with a passive wireless inclinometer sensor operating at 860 MHz. The results can be further used to realize a reader device for intermodulation communication sensors, maximize its operational parameters, and optimize the sensor structure for the best readout resolution.
Original languageEnglish
Pages (from-to)2280-2286
JournalIEEE Sensors Journal
Issue number4
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed


  • estimation
  • RFID
  • signal processing
  • algorithms
  • wireless sensors


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