On Sat, Dec 12, 2009 at 12:07:43PM +0330, p q wrote: > this answer just came from ettus : > ---------- > The USRP2 can sample roughly 30MHz of bandwidth. I don't off the top of > my head know what the single channel bandwidth for > GSM1800 is, but you can use the 30MHz as a rough estimate of the > capabilities of the USRP2. > ------------ > so to capture GSM1800 ( 2*75 ) we need at least 5 USRP2 working parallel , > without any FPGA development >
Taken the number 30, i suspect that this refers to the bandwidth supported by the gigabit ethernet. For the USRP1, the often cited 8mhz width comes from the sustainable bandwidth of 256mbit/s of its USB bus. 8mhz * 2 * 16bit. 2 for complex samples. the same equation gives ~ 30mhz spectrum for GBE. thus with the proper compression of the spectrum, you can transfer 15 * 5 = 75 ARFCNs via gigabit ethernet. (i assume). _______________________________________________ A51 mailing list [email protected] http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
