> > So, Only case 1 is working for me. I am not using any custom > gnuradio-block in > > my receiver. Major blocks in my demodulator chain consists of FIR > filters, > > gr_pfb_clock_sync_ccf and packet decoder along with some adders > subtractors > > etc. what is the difference caused by the same demodulator chain when > reading > > data directly from usrp source and from file source? is it because some > of the > > demodulator chain blocks are causing back pressure due to taking too > much time > > in processing but when run in real time it causes data loss during > exchange of > > samples between blocks.? I am confused if in real time the > > gr_pfb_clock_sync_ccf block or any other major block stucks in processing > > during which samples are lost due to new incoming samples. > > Are you observing overflows? If so, have you tried reducing the > bandwidth and see if that helps? >
Thanks for your reply. I am not observing any overflows. I am using 500k sample rate. My system specs are 6GB RAM core i7 ubuntu 12.04. What could be the issue ? Regards. M.S.
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