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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 Tork on Wednesday May 21 2014, @06:57PM

    by Tork (3914) Subscriber Badge on Wednesday May 21 2014, @06:57PM (#46072)
    I wonder why you read that summary and thought it just contained five words: "FM radio can be triangulated." I'm seeing more and more of this crap lately and it reminds me of what the green site smells like.
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