Jin Mitsugi Hiromu Kamei Yuusuke Kawakita Haruhisa Ichikawa Real-Time Separation of Collided Signals in Multiple Zones Backscatter Communication System. 87-92 2019 WiSEE https://doi.org/10.1109/WiSEE.2019.8920346 conf/wisee/2019 db/conf/wisee/wisee2019.html#MitsugiKKI19