Hi Meny,
I imagine that's exactly what you need. Not only locate disaster victims,
but also encourage them. You could always modify openbts code to not
register or communicate with them, but what of the victim, thinking that it
connected to a network and can't ask for help?
BR,
Nikos
On Tue, Mar
Marcus,
Thanks again. Very helpful as always.
Of course those are 2 completely different approaches, but this one can
also be useful to me.
I'll start looking in to it right now.
Thanks!
2016-03-15 18:02 GMT+02:00 Marcus Müller :
> That is direction finding, not distance estimation based on sign
That is direction finding, not distance estimation based on signal
power. Two totally different approaches. You'll need at least two
antennas for direction estimation.
Meny, you're an engineer, read up on the theory; it's actually fun to
see these signal and geometric equations fall into place.
I
radio-bounces+ralph=schmid@gnu.org] *On Behalf Of *Meny
> Sidar
> *Sent:* Tuesday, March 15, 2016 3:18 PM
> *To:* Nikos Balkanas
> *Cc:* discuss-gnuradio@gnu.org; Marcus Müller
> *Subject:* Re: [Discuss-gnuradio] Picking up RF cellular signals
>
>
>
> Thank you for yo
+ralph=schmid@gnu.org] On Behalf Of Meny
Sidar
Sent: Tuesday, March 15, 2016 3:18 PM
To: Nikos Balkanas
Cc: discuss-gnuradio@gnu.org; Marcus Müller
Subject: Re: [Discuss-gnuradio] Picking up RF cellular signals
Thank you for your comments.
Marcus, sorry for bugging you with this issue.
I am
Thank you for your comments.
Marcus, sorry for bugging you with this issue.
I am well aware of the previous discussions with you, and have learned from
them as well as from other people.
however, when i come across something like this for example:
https://www.youtube.com/watch?v=ZUqzdrB1o2U
i keep
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 Müll
Hi Meny,
>
> 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.
That won't really work, as I explained already[3]. Cell phones of any
generation since 2G can (and must) s
> 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...
Well ... no, not realistically.
An idle phone does
It would be very helpful, but of course isn't an option...
2016-03-14 17:11 GMT+02:00 Dan CaJacob :
> I don't know much about cell phones, but would it help if you placed a
> call to a known number? Does that force a response? Of course, this might
> be counter-productive in a congested disaste
I don't know much about cell phones, but would it help if you placed a call
to a known number? Does that force a response? Of course, this might be
counter-productive in a congested disaster environment.
- Dan
On Mon, Mar 14, 2016 at 10:56 AM Meny Sidar wrote:
> Hi guys,
>
> I am currently wo
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
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