A technology that lets you see behind walls could soon built in your cell phone.(developed by MIT professor And graduate student).
the device uses wireless antenna in a cell phone or laptop, technique behind this is cancelling out all interfering signals,Wi-Fi signal doesnot just bounce off humans,but also walls, floors,and furniture.the signals are 10,000 to 100,000 times more powerfull than the reflection of human body.
How it works?
Wi-Vi sends out two wireless signals, one of which is inverse of other. The so called "Interference nulling": the two signal cancel each other out unless they hit a moving things,target such as a Human.
Note: The device meant to be portable so for example, a person worried that some one was hiding in the bushes could do a quick scan for her personal safety
the device uses wireless antenna in a cell phone or laptop, technique behind this is cancelling out all interfering signals,Wi-Fi signal doesnot just bounce off humans,but also walls, floors,and furniture.the signals are 10,000 to 100,000 times more powerfull than the reflection of human body.
How it works?
Wi-Vi sends out two wireless signals, one of which is inverse of other. The so called "Interference nulling": the two signal cancel each other out unless they hit a moving things,target such as a Human.
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