From the Signal Kinetics group at the MIT Media Lab: RFind, a new technology that allows us to transform low-cost, battery-free wireless stickers into powerful radars. By placing one of these stickers on any object, we can locate it with extreme accuracy. At a high level, our technology operates by measuring the time it takes the signal to travel from the wireless sticker to an access point. By taking into account the speed of propagation of light, we can then map the time to an exact location (with sub-centimeter precision) in 3D space.
Learn more: https://www.media.mit.edu/projects/rfid-localization/overview/#
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