On Mon, Jan 04, 2010 at 02:16:57PM +0330, p q wrote: > to capture Downlink of a BTS that offers GSM1800 you need to capture at > least 75 MB of the spectrum space . this is far more than USRP and also > beyond USRP2
this is not true. a usrp2 can sample 100mhz from the air and it can transfer about 30mhz across the GBE interface, which is roughly 1/3 of the whole 1800 band. take a look at the sample allocation of the GSM1800 band in germany and you will see, that a USRP2 can capture all ARFCNs of one operator's network. http://www.elektrosmog.de/Frequenzplan-GSM1800.htm also that does not include the fact that not all ARFCNs are used in a single cell because they would interfere with neighbour cells and that not all ARFCNs are used at the same time. This happened to me last time at a summer festival which was in a remote location and overcrowded. _______________________________________________ A51 mailing list [email protected] http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
