On Tue, Sep 14, 2010 at 12:49:29PM +0200, Љубомир Самарџић wrote:
> Hello people,
> 
> Is it possible to record several ARFCNs at once? Or record some narrow band
> (5 - 10 Mhz wide) and extract offline data for specific frequency from band?

yes its possible but airprobe currently does not support hopping. It is
on the todo list, though.

> 
> I'm reading about frequency hopping and USRP/USRP2, and everybody speaks
> about following up a MAIO and HSN parameters in real time. My question is,
> if BST publicly says that it serves certain ARFCNs (for example 40 of them),
> is there a chance to record a traffic from all of them and reconstruct
> hopping and traffic data offline?

Yes, as long as they are confined to an 8Mhz or 25 Mhz band (for USRP and
USRP2 respectively). Or if you have many USRPs, then you can of course
scan a wider band. The amount of data is quite large: 32mbyte/sek for USRP1
with 16bit I/Q samples. A real time demodulator is on the TODO list, and
it would reduce that by a factor of ~ 32.


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