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Re: [Discuss-gnuradio] Unexpected issue with file source and USRP source
From: |
Martin Braun (CEL) |
Subject: |
Re: [Discuss-gnuradio] Unexpected issue with file source and USRP source |
Date: |
Thu, 12 Dec 2013 12:47:31 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Dec 12, 2013 at 03:54:29PM +0500, Maria Stevens wrote:
> 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?
MB
--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)
Dipl.-Ing. Martin Braun
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KIT -- University of the State of Baden-Württemberg and
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