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Smartphone with FM Radio Tells Your Position

posted by LaminatorX on Wednesday May 21 2014, @03:54PM   Printer-friendly
from the Radio-Gaga dept.

kaszz writes:

The reason why FM receivers are present on smartphones is that they can be used to locate your position by noting a simple thing as signal strength of transmitters. More advanced methods makes use of SNR, frequency deviation and multipath interference characteristics. And the same method can be used for WiFi which of course makes collection of such data very useful for localization purposes where GPS etc isn't useful. Arrival time of a radio signal that is reported to the operator from many devices may also be used for the same purpose.

 
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  • (Score: 2) by ikanreed on Wednesday May 21 2014, @04:39PM

    by ikanreed (3164) on Wednesday May 21 2014, @04:39PM (#46014) Journal

    I think the basic principals of triangulation go over most peoples' heads. They just look at their phone's "GPS" and go, "oh, I'm here"

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  • (Score: 3, Funny) by mcgrew on Thursday May 22 2014, @01:31AM

    by mcgrew (701) <publish@mcgrewbooks.com> on Thursday May 22 2014, @01:31AM (#46220) Homepage Journal

    The basic principles of most things go over most people's heads.

    --
    Carbon, The only element in the known universe to ever gain sentience