RFGo: A Seamless Self-checkout System for Apparel Stores Using RFID Carlos Bocanegra (Northeastern University) Mohammad A. (Amir) Khojastepour (NEC Laboratories America) Mustafa Y. Arslan (NEC Laboratories America) Eugene Chai (NEC Laboratories America) Sampath Rangarajan (NEC Laboratories America) Kaushik R. Chowdhury (Northeastern University)
THE PAINFUL CHECKOUT PROCESS < 2 > Only 23% of consumers are satisfied with the checkout process 1 13% sees the checkout burden as the decisive factor to switch to another store 1 [1] Forrester. 2018. Consumers Cringe At Slow Checkout. Forrester Opportunity Snapshot: Digimarc August 2018 (8 2018). https://www.digimarc.com/resources/forrester-study
RFGo - OUR VISION < 3 > No Large Unbarricaded High manual checkout checkout Speed effort area area checkout
CHALLENGES OF USING RFID FOR CHECKOUT < 4 > Blind Spots CHIP RFID And TAG READER POWER Coupling Illumination Orientation MEMORY QUERY DATA ID ID Backscattering ANTENNA Collisions Longer Range Faster speed Position uncertainty Mobility Non-stationary env.
RFGo - OUR SEAMLESS CHECKOUT SYSTEM < 5 > Self-checkout vision 1. Physical structure 2. Custom-built multi-antenna reader 3. Tag classification via supervised learning Classification accuracy over 99%, with 99.79% precision and 99.77% recall
RFGo IMPLEMENTATION BLOCK DIAGRAM < > 6 Octoclock for frequency And time sync UBX daughterboard for single TX-chain Attributes from Binary Classifier reader Inside CA USRP Outside CA X310 with TwinRX Raspberry Pi controls daughterb the active TX antenna oards for through MUX RX-chains [1] Nikos Kargas, Fanis Mavromatis, and Aggelos Bletsas. 2015. “ Fully-Coherent reader with commodity SDR for Gen2 FM0 and computational RFID, ” IEEE Wireless Communications Letters 4, 6 (2015), 617–620. https://doi.org/10.1109/LWC.2015.2475749
< 7 > THANKS
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