> Can a pair of WiFi transceivers outside the house determine if the person inside the house is the same as the one in the robbery video? Questions such as this have motivated this new technology
We have windows, tiny little cameras that go through walls, and we can ping cell-phones. Correct me if I'm wrong, but wouldn't all of those work better than this incredibly convoluted method?
On a legal basis, however, in some states it's illegal to even look over a privacy fence without a search warrant. I imagine this approach is less accounted for by lawmakers of the past.
And since it could use your existing home Wifi as the source signal thus the sensor would be receive-only, it could be very battery efficient so could last a long time on battery.
This is research. Currently it's unreliable (83% is super low) and convoluted, but with more research and investments, it is possible that they would be able to make it reliable and practical.