Hi all,
Martin, Aditya is correct I too am facing this issue with the new
rx_ofdm.grc. This error is prominent its only in some gain settings the model
works. Moreover in QPSK modulation CRC is rejecting nearly all the packets.
Thanks,
Ashish
On Thursday, 7 November 2013 6:27 PM, Martin Braun (CEL) <martin.br...@kit.edu>
wrote:
On Wed, Nov 06, 2013 at 06:27:40PM -0500, Aditya Dhananjay wrote:
> I created an OFDM TX/RX flowgraph (mostly copying stuff out from the GNU Radio
> reference GRC implementation), where the TX goes out to a USRP UHD sink, and
> the RX reads from a USRP UHD source.
>
> As long as the receive SNR is high enough, the problem does not show up.
> However, as I gradually reduce the RX gain, at some point, the entire thing
> crashes with the "Buffer too small for min_noutput_items" error.
Are you using a current version? This problem was caused by bit errors
creating incorrect, but validated headers. In the current header, we
have an 8 Bit CRC check, which is pretty unlikely to cause this.
MB
--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)
Dipl.-Ing. Martin Braun
Research Associate
Kaiserstraße 12
Building 05.01
76131 Karlsruhe
Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu
KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association
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