Comparative assessment of antenna mode and clutter signals in backscattering based UWB-RFID detection (TD(12)04025)
Résumé
Abstract—In modulated backscattering based RFID systems, the
"antenna mode" signal received by the reader from the tag can
be strongly masked by that originating from the environment
(clutter). Although differential detection and appropriate coding
may mitigate this problem, it is important to quantitatively
evaluate the respective magnitude of both signals. In that work
this has been done for a UWB RFID system, intended to operate
in the 3-5 GHz band. From 5 ports channel measurements
between a set of 4 reader antennas and a tag antenna in various
orientations, the antenna mode signal and the clutter signal in the
same time window have been determined over a grid of tag
positions, providing a distance-dependent statistical model of the
signal to clutter power ratio.