Control your phone with a radio wave

摘要

All you need to control a cellphone via hand gestures is the phone's signal. The radio waves emitted by cellphones are reflected back to them in unique ways by hands -allowing gestures to be recognised. SideSwipe is the work of Matthew Reynolds and colleagues at the University of Washington in Seattle. It comprises an algorithm that recognises the unique reflections created when fingers interrupt a burst of the radio waves that send information between your phone and the cellphone mast. In tests with 10 volunteers, the program could recognise eight separate taps, four hovers and two sliding gestures with 87 per cent accuracy.