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Dynamic interference suppression for chipless wireless sensors based on an out-of-band channel estimation method

Published online by Cambridge University Press:  04 March 2014

Bernd Kubina ,
Christian Mandel ,
Martin Schüßler  and
Rolf Jakoby
Bernd Kubina*
Affiliation:
Technische Universität Darmstadt, Institute for Microwave Engineering and Photonics, Merckstrasse 25, 64283 Darmstadt, Germany. Phone: +49 6151 1675163
Christian Mandel
Affiliation:
Technische Universität Darmstadt, Institute for Microwave Engineering and Photonics, Merckstrasse 25, 64283 Darmstadt, Germany. Phone: +49 6151 1675163
Martin Schüßler
Affiliation:
Technische Universität Darmstadt, Institute for Microwave Engineering and Photonics, Merckstrasse 25, 64283 Darmstadt, Germany. Phone: +49 6151 1675163
Rolf Jakoby
Affiliation:
Technische Universität Darmstadt, Institute for Microwave Engineering and Photonics, Merckstrasse 25, 64283 Darmstadt, Germany. Phone: +49 6151 1675163
*
Corresponding author: B. Kubina Email: kubina@imp.tu-darmstadt.de
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Abstract

A channel estimation method for chipless wireless sensors is presented. The method is developed to suppress interference signals in radio frequency backscatter systems. It uses two adjacent frequency bands to estimate and suppress the disturbing signal of a dynamic interferer. Afterwards a correction of the sensor tag's backscatter signal is achieved. The method has been tested in indoor measurements with a chipless strain sensor and a chipless temperature sensor. A metal block has been deployed as an interferer. In the given scenario, the method has enabled a determination of the sensors' resonance frequencies with relative errors of <2% in average. A general dependence of the estimation robustness on the peak bandwidth is observed.

Keywords

RFID and sensorsWireless systems and signal processing (SDR, MIMO, UWB, etc.)
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 3-4: European Microwave Week 2013 , June 2014 , pp. 353 - 360
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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