WIRED Staff
Science

Slideshow: GNU Radio Opens an Unseen World

An open-source software-configured transceiver can open garage doors, track cell phone users and locate itself on GPS. And that's just the beginning. By Quinn Norton.
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USRP assembled with daughterboards: TVRX 50 MHz to 870 MHz receiver, BasicTX 2 MHz to 200 MHz transmitter, RFX400 -- 400-500 MHz transceiver, 100+mW outputPhoto: Quinn Norton

See related story: GNU Radio Opens an Unseen World

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PathIntelligence's FootPath software uses GNU Radio and the USRP to track foot traffic for shopping centers. The more red and area, the higher the number of mobile phones detected by the radio setup.

Image: Courtesy of PathIntelligence
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Matt Ettus, creator of the Universal Software Radio Peripheral or USRP motherboard and a few of the nine daughterboards available for use with it.

Photo: Quinn Norton