Short answer: you can go as wide as your CPU will handle. If you only need a few channels but they're separated by a few MHz, use the frequency xlating filters to bring each channel to baseband. If you have a regularly-spaced band, use the channelizer.
--n On Tue, 2010-12-21 at 14:10 -0500, Walker, Robert CIV NWDC, Science Advisor wrote: > On Tue, Dec 21, 2010 at 06:02:44PM +0800, James Jordan wrote: > > Hi all, I need to receive many narrowband signals, but usrp hard ware only > > provide 4 RX, > > so I need to receive more than one narrowband signals per RX. Is my idea > > possible? > > I dont want to use more than one usrp to achieve that, anyway which will be > > an > > option if my first idea can't work. > > On Tue, 21 Dec 2010 11:19:30 +0100, Martin Braun replied: > >If your total bandwidth (sum of all bandwidths) does not exceed a couple > >of MHz, you can use the polyphase channelizer (pfb_channelizer_ccf). > >The result will be an equally spaced set of narrowband channels. > > Why the "couple of MHz" limitation? Is it because of the USRP, the USB > interface, the host computer, the polyphase channelizer, or some combination? > In short, why can't the entire 6 MHz USRP bandwidth be channelized? > > Thanks, > > Rob > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
