University of Washington researchers propose a novel gesture detection technology-- WiSee, a system using regular wifi signals instead of cameras or sensors to detect control gestures, without need for line-of-sight.
The technology measures the so-called "Doppler frequency shift" caused in wireless signal frequency by body movements. Such frequency changes are very small (several hertz compared to 5GHz wifi signals), yet UW says the technology identifies up to 9 different whole-body gestures through a clever algorithm measuring these slight shifts.
“This is repurposing wireless signals that already exist in new ways,” UW lead researcher Shyam Gollakota says. “You can actually use wireless for gesture recognition without needing to deploy more sensors.”
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