In addition, a prototype project was implemented in a carton
packing factory, where each paper pillar was over 2500 kg
and was bigger than 3 m × 1.5 m × 2.5 m. The pillars were
placed in a layered manner. Fig. 9 illustrates the real deployment
of using the iLocate system (see Fig. 10 for the snapshot
of using the iLocate system for indoor positioning). Both
Alien 9900+ passive readers and Impinj R420 passive readers,
together with ultrahigh frequency tags with omnidirectional
antennas, have been tested. However, their recognition rates
were quite low. The Ekahau RTLS system has been also tested