On Wed, Jun 9, 2010 at 8:27 PM, Roberto de Matos <rma...@das.ufsc.br> wrote: > Hello, > > The maximum sampling window of USRP2's ADC is 50MHz or 100MHz? > Because of Nyquist Theorem the straight answer is 50MHz, once the ADC runs at > 100MHz. However if we use the complex samples (quadrature sampling) the > answer is 100MHz. > So, which is right??
Nyquist states you need a sampling frequency of 2x the bandwidth of the signal you are sampling. When you do real sampling, you are able to accurately sample a bandwidth of [0,Fs/2]. With baseband IQ sampling, you are accurately able to sample a bandwidth of [-Fs/2,Fs/2]. Note you did not gain any positive frequency content, and only negative frequency content due to knowing the phase of your signal now. Hopefully this clears up your confusion. > Thank you, > > Roberto de Matos Brian _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
