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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.
by Emerging Technology from the arXiv

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. That’s given more than one group of researchers an interesting idea.

Read more on technologyreview.com.

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