RFGo: A Seamless Self-checkout System for Apparel Stores Using RFID - - PowerPoint PPT Presentation

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)

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THE PAINFUL CHECKOUT PROCESS

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[1] Forrester. 2018. Consumers Cringe At Slow Checkout. Forrester Opportunity Snapshot: Digimarc August 2018 (8 2018). https://www.digimarc.com/resources/forrester-study

13% sees the checkout burden as the decisive factor to switch to another store1 Only 23% of consumers are satisfied with the checkout process1

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RFGo - OUR VISION

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No manual effort Large checkout area High Speed checkout Unbarricaded checkout area

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CHALLENGES OF USING RFID FOR CHECKOUT

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Blind Spots

Illumination Orientation Coupling

Collisions Position uncertainty

Mobility Non-stationary env.

CHIP And MEMORY ANTENNA QUERY

POWER

DATA

Backscattering

RFID TAG

ID ID

READER

Longer Range Faster speed

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RFGo - OUR SEAMLESS CHECKOUT SYSTEM

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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

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Attributes from reader

Inside CA Outside CA

Binary Classifier

RFGo IMPLEMENTATION BLOCK DIAGRAM

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Octoclock for frequency And time sync USRP X310 with TwinRX daughterb

• ards for

RX-chains UBX daughterboard for single TX-chain Raspberry Pi controls the active TX antenna through MUX

[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

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THANKS

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