Comparative assessment of antenna mode and clutter signals in backscattering based UWB-RFID detection (TD(12)04025)

International audience<p>Abstract—In modulated backscattering based RFID systems, the&quot;antenna mode&quot; signal received by the reader from the tag canbe strongly masked by that originating from the environment(clutter). Although differential detection and appropriate codingmay mitigate this problem, it is important to quantitativelyevaluate the respective magnitude of both signals. In that workthis has been done for a UWB RFID system, intended to operatein the 3-5 GHz band. From 5 ports channel measurementsbetween a set of 4 reader antennas and a tag antenna in variousorientations, the antenna mode signal and the clutter signal in thesame time window have been determined over a grid of tagpositions, providing a distance-dependent statistical model of thesignal to clutter power ratio.