Re: [Discuss-gnuradio] Picking up RF cellular signals

[Nikos Balkanas]

Indeed, there is phone locator protocol, and a service offered as by some companies. They work through provider contracts. The problem is that you have to know the phone number beforehand and the carrier. Not very useful in a disaster case :(

BR,

Nikos

On Mon, Mar 14, 2016 at 5:50 PM, Marcus Müller <address@hidden> wrote:

    True, at least unless you send them something they have to react to. Which the phone will only do if you're the infrastructure, and usually implies you authenticate as such[2]. Which will hence most likely only work if the cellular providers cooperate with you.

​[...snip...]​

On 03/14/2016 03:54 PM, Meny Sidar wrote:

Hi guys,

I am currently working on a project for my university, where i'm trying to locate cellular phones using SDR (USRP B210).

The idea of the project is to be able to find survivors/victims in disaster areas, such as earthquakes, by assuming they have their cellular on them.

What i did so far, is a program that calculates and outputs in a loop the power transmitted from a cellular phone from it's uplink channel. that can tell me my distance to it.

problem is, that cellular phones are usually in idle mode and not transmitting at all. 

So it works, but only if the phone is currently transmitting to the network (phone call, internet, etc..)

I'm trying to find a solution for this,

There has to be a way of knowing that some kind of RF transmitter/receiver is near me...

If anyone can shed some light on this subject, what can i do or if i need to go in another way, i'll be very grateful! 

right now i'm stuck.

Thanks a lot,

Meny

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