Don't fidget! WiFi will count you

Researchers in UC Santa Barbara professor Yasamin Mostofi’s lab have enabled, for the first time, counting a stationary seated crowd using WiFi signals, and without relying on people to carry a device. The technique, which also counts through walls, needs only a wireless transmitter and receiver outside the area of interest where the crowd is seated. It has a variety of applications, including smart energy management, controlling the crowd size during a pandemic, business planning and security.

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