Wi-Vi

Wi-Vi

(WIreless-VIsion) Using Wi-Fi to locate moving objects behind walls. Two signals are transmitted; one the inverse of the other. When reflected back from the wall or non-moving objects behind the wall, the signals cancel themselves. However, moving objects behind the wall cause the reflections to change, which can be detected. The advantage of this technology is that it can be built into small handheld devices.
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References in periodicals archive ?
The system, called "Wi-Vi," is based on a concept similar to radar and sonar imaging.
MIT researchers are developing a device called a "Wi-Vi that uses low power Wi-Fi signals to track moving people, and can even detect people behind walls.