DBSRX Multiple Input

GNU Radio
1

Hi,

i’m trying to receive the dedicated control channel SACCH (GSM)
between MS and BTS (MS --> BTS). But to do this task i need also
listen the control channel between the BTS and MS. My question is if i
can receive this two signals (diferent spectrum) at the same time with
my board (USRP + DBSRX) or maybe i need other daughterboard to manage
this signals.

Other solution that i was thinking is to listen the BTS->MS control
channel to know the frame number (synchronize) and after that listen
the MS->BTS SACCH.

I’m using GNUradio 3.2, GSSM project and GSMSP project.

Matías.

2

Matias Torres Risso wrote:

channel to know the frame number (synchronize) and after that listen
the MS->BTS SACCH.

I’m using GNUradio 3.2, GSSM project and GSMSP project.

If the two channels are close enough to be within the DBSRX passband,
you could receive both. Otherwise, you’d need two DBSRX boards.

Matt

3

2009/6/11 Matt E. [email protected]:

Matt

Thanks,

But that is exactly the problem. The bandwidth of the DBSRX is not
enough to capture both frequency channels. So i’ll get another board.

Matías Torres Risso - Ingeniero Civil Eléctrico Universidad de Chile
(En Proceso de
Titulación)