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Re:Amazon Go by cobookman on Monday December 05, 2016 @12:35PM (#13107280)
> How do you scan them all quickly without missing any?

Most RAIN Rfid readers have a read rate of 800+ tags/second. Door portals are a solved solution and now phased arrays are on the market which scan all items in realtime. Take a look at the impinj marketing material for more information. For example the RS2000 chip: http://www.impinj.com/products/reader-chips/indy-rs2000/

Re:Amazon Go by joezydeco on Monday December 05, 2016 @01:50PM (#13108092)
That's a definite plus. I was just saying that the long-range position tracking might not be as important.