Experimental Evaluation of a UHF-MIMO RFID System for Positioning in Multipath Channels
| Autor: | Holger Arthaber, Daniel Neunteufel, Florian Galler, Ulrich Mühlmann, Stefan Johannes Maier, Stefan Grebien, Klaus Witrisal |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computer science
010401 analytical chemistry Testbed Bandwidth (signal processing) MIMO 020206 networking & telecommunications 02 engineering and technology 01 natural sciences 0104 chemical sciences symbols.namesake Additive white Gaussian noise Transmission (telecommunications) Ultra high frequency Hardware_GENERAL 0202 electrical engineering electronic engineering information engineering Electronic engineering symbols ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS Wideband Multipath propagation Computer Science::Information Theory |
| Zdroj: | RFID-TA |
| DOI: | 10.1109/rfid-ta.2019.8892179 |
| Popis: | This paper presents an experimental evaluation of an ultra-high-frequency (UHF) multiple-input-multiple-output (MIMO) radio-frequency identification (RFID) system for positioning. To this end, we propose a set of novel parametric maximum likelihood direct-positioning algorithms capable of exploiting the coherent measurements performed by closely-spaced antennas and simultaneously exploiting the non-coherent measurements by widely-spaced antennas. The radio channel indoors for relatively small bandwidth can be characterized by a line-of-sight component plus a multitude of so-called dense multipath components (DMC). The proposed algorithm framework is able to consider the DMC, enabling more accurate positioning. We present an experimental RFID testbed, capable of performing wideband measurements up to 50MHz bandwidth. This testbed is able to query the RFID tag at the UHF band while performing the position measurements in the 2.45 GHz band, supporting such wideband signal transmission. A dual-frequency RFID tag is presented, equipped with two antennas, scattering back synchronously at the UHF and 2.45 GHz bands. Utilizing the experimental UHF-MIMO RFID testbed we show that 80% of the position errors are smaller 0.15m if the DMC process is included in the algorithm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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