Re: [Discuss-gnuradio] Fundamental question on Sampling rate

[Jeff Long]

Correct, you need at least 50 MS/s complex (I+Q) which is 100 MS/s or 
400 MB/s from an I/O point of view. GNU Radio blocks can be used for 
real time decoding. Depending on what kind of "decoding" you want to do, 
the processor may not be able to keep up.

On 04/26/2018 04:05 AM, mehtap özkan wrote:
> Dear All,
>   Mine is more of a fundamental question.
> I have a 50 MHz (3 db bandwidth) wide QPSK signal.
> I am aware that Gnuradio blocks can not be used for real time decoding.
> In order to record the signal and demodulate it correctly, what should 
> the minimum sampling rate be?
>   If the minimum sampling rate is 100 MSPS, then I am pretty much stuck 
> with USRP x310 as the only selection available.(or maybe LIMESDR-PCIe)
> I am also not sure  if the source block streams 100 MSPS sampled signal 
> or I+Q (50 MHz-I, 50 MHz-Q).
> Thank you in advance.
>
>
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