Tracking People in Their Homes with WiFi Signals



  • Using Wi-Fi to “see” behind closed doors is easier than anyone thought

    With nothing but a smartphone and some clever computation, researchers can exploit ambient signals to track individuals in their own homes.

    Wi-Fi fills our world with radio waves. In your home, in the office, and increasingly on city streets, humans are bathed in a constant background field of 2.4- and 5-gigahertz radio signals. And when people move, they distort this field, reflecting and refracting the waves as they go.
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    That’s given more than one group of researchers an interesting idea. In theory, they say, it ought to be possible to use this changing electromagnetic field to work out the position, actions, and movement of individuals. Indeed, several groups have created imaging systems that use Wi-Fi to “see” through walls....



  • @mlnews Yeah, great idea and technology! By the way, it was reported 5 years ago as Wi-Vi: https://newatlas.com/wi-vi-see-through-walls/28120/



  • Many, many, many years ago a couple of buddies and I rented a house in Winnipeg just west of downtown.

    All of our electronics would go bat sh*t crazy in the evenings with loud blasts of static. It took a bit to figure out, but it turned out that a neighbour beside us was using a CB among other radios.

    Long story short, one of my roommates took matters into his own hands when the neighbour refused to do anything about it (eaves were contacting and his antenna was not grounded properly plus the homes were built in the early 1940s).

    The neighbour and a couple of his buddies figured out where the "problem" was by triangulating. 😉

    It's not hard to figure out the what/where/when of any radio signal. It just takes some time and patience and three points of reference.


  • Service Provider

    @PhlipElder said in Tracking People in Their Homes with WiFi Signals:

    Many, many, many years ago a couple of buddies and I rented a house in Winnipeg just west of downtown.

    All of our electronics would go bat sh*t crazy in the evenings with loud blasts of static. It took a bit to figure out, but it turned out that a neighbour beside us was using a CB among other radios.

    Long story short, one of my roommates took matters into his own hands when the neighbour refused to do anything about it (eaves were contacting and his antenna was not grounded properly plus the homes were built in the early 1940s).

    The neighbour and a couple of his buddies figured out where the "problem" was by triangulating. 😉

    It's not hard to figure out the what/where/when of any radio signal. It just takes some time and patience and three points of reference.

    Tracking the devices is easy, this is tracking the people and objects inside the house!



  • 10-4. Radio Imaging sorta.

    The idea has been around for a long time? I seem to remember movies having this type of thing happening?


  • Service Provider

    @PhlipElder said in Tracking People in Their Homes with WiFi Signals:

    10-4. Radio Imaging sorta.

    The idea has been around for a long time? I seem to remember movies having this type of thing happening?

    It's a bit like X-Ray. It's all just non-visible light, but with different sources, bounce patterns, and penetration. Wifi is interesting because it is so common and "bright". There is just so much of it, everywhere.