Yes, Wi-Fi Routers Can Detect Movement in Your House - Here's How

[128bit]

. . . very interesting read.

MSN

 

[dave14305]

More direct link to the original source.

Yes, Wi-Fi Routers Can Detect Movement In Your House - Here's How - SlashGear

Your Wi-Fi router is capable of detecting your movement. When you move or breathe, there are tiny disruptions in wireless signals that can be tracked.

www.slashgear.com

 

[user114514]

The practicality of these techniques is questionable. Without the help of 802.11mc/az/bk, the data obtained is difficult to relate to reality. And routers that support these standards are as rare as rational numbers in the real number set.

 

[sfx2000]

Fun stuff - back in the 07-08 time frame, did some exploration around using WiFi for applications like this...

For a single AP - one could get a sense of range from the AP, but no azimuthal information about where the target might be - one would have to have 3 or more AP's to make sense of the returned information - and there, the timing for the beacon frames left a low level of trust due to multi-path... As part of the project - we also looked at UWB, and with some tweaks for impulse radio mode, we were able to get 1 cm resolution - and some complicated math we were able to get 3d (range, direction on the horizontal and vertical planes) info with 2 transceivers based on DTOA (differential time of arrival) techniques...

While we passed on moving from research into some level of commercialization - companies like Nordic Semi have taken similar approaches, and have some really cool stuff with UWB-IR for location info..