Want Xray vision like the man of steel? A technology that
lets you see behind walls could soon be built in to your cell phone.
MIT professor Dina Katabi and graduate student Fadel Adib
have announced WiVi, a demonstration of a technology that uses WiFi to
allow a viewer to "see" a person moving behind a wall. (WiVi stands
for "WiFi" and "vision.")
Previous work demonstrated that the subtle reflections of
wireless inter signals bouncing off a human could be used to track that
person's movements, but those previous experiments either required that awireless router was
already in the room of the person being tracked, or "a whole truck just to
carry the radio," said Katabi.
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