Any ideas to receive the uplink signals? As it needs to be sync with
the downlink, do we need to use two channels?
On 28/9/2011 22:26, Pablo Lopez wrote:
Hi everyone,
I am new in this group. First of all, just to say that the work done
by you guys and Security Research labs is simply unbelievable, and for
a future engineer like me (I hope so) is such an inspiring work.
I am studying telecommunications engineering, and I am very interested
in what you are doing here.I would like to know what is the state of
art of the software when it comes to decode uplink GSM signals. I
already managed to decode GSM downlink signals using USRPs and
Airprobe. Recently I purchased a USRPN210 and my ambition is to decode
uplink signals.
To decode downlink signals I was using the Airprobe tools gsmreceiver
and gsmtvoid and then gsmdecode. Both gsmreceiver and gsmtvoid need a
fixed frequency to listen, so when frequency hopping is running they
are not usable. I guess that I need to change this code somehow to
solve the frequency hopping issue. I have two questions:
Does anyone know or have a similar code to handle frequency hopping?
Assuming that frequency hopping is solved, and I want to use the
output of that code as an input for gsmdecode or Wireshark, are these
tools capable of decoding uplink packets?
Thanks in advance for your help!
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