On 11/8/11 9:29 AM, 弓长张 wrote: > I'm a starter in using the USRP, it's known that the bandwidth of USRP > is 8M beacause of the USB bandwidth ,my question is the 8M refers to the > Nquist Bandwith or the actual signal bandwidth?If it refers to the > Nquist Bandwith, it is mean that USRP can only process the signal with > 4M bandwidth,so if a signal larger than 4M, how can USRP deals with it ?
Because the USRP does complex samples, an 8 megasample/sec rate is enough to resolve up to 8 MHz. This is in contrast to magnitude-only real samples, where an 8 megasample/sec rate would only resolve up to 4 MHz. A qualitative way to think about it is that complex samples provide twice the data as magnitude-only real samples, providing that "factor of 2". Nyquist will not be cheated! @(^.^)@ Ed _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
