Multi-path interference reduction in passive NLTL RFID tags

Author

Yunfei Ma ; Kan, Edwin C.

Author_Institution

Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA

fYear

2013

fDate

14-18 April 2013

Firstpage

1

Lastpage

4

Abstract

We propose a multi-path interference reduction method of continuous wave (CW) passive RFID for indoor ranging applications by adopting nonlinear transmission line (NLTL) tags. Because the power and phase information are contained within the second harmonic (SH) rather than the fundamental frequency, interference and phase errors caused by direct reflections of interrogating signal can be greatly reduced. We present both theoretical predictions and simulations, followed by experimental results to verify the effectiveness of the proposed approach.

Keywords

indoor radio; interference suppression; radiofrequency identification; reflection; continuous wave passive RFID; indoor ranging applications; interrogating signal; multipath interference reduction method; nonlinear transmission line; passive NLTL RFID tags; phase errors; phase information; second harmonic; Distance measurement; Downlink; Interference; Passive RFID tags; Reflection; Uplink; Continuous wave; NLTL; harmonic generation; multi-path reflection; passive RFID; ranging;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Symposium (IWS), 2013 IEEE International

Conference_Location

Beijing

Type

conf

DOI

10.1109/IEEE-IWS.2013.6616818

Filename

6616818