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Re: [Discuss-gnuradio] tx_ofdm.grc & rx_ofdm.grc output data
From: |
Martin Braun (CEL) |
Subject: |
Re: [Discuss-gnuradio] tx_ofdm.grc & rx_ofdm.grc output data |
Date: |
Thu, 24 Oct 2013 10:01:23 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Oct 23, 2013 at 06:19:00PM -0700, eontool wrote:
> Has anyone tested successfully these two files combined?
>
> The input data or vector source is an array of 96 elements [0-95] but I'm
> getting a strange output at the end.
>
> The 96 + 4 elements from the crc, then another 100 values (200 total), then
> the sequence repeats.
Hi eontool,
did you change any of the other settings, or use the defaults?
The data you're seeing is *after* the CRC?
> I tried using the OFDM transmitter and receiver blocks and they work
> perfectly, same input as ouput.
>
> I began tracing the problem comparing the same log debug output files and it
> seems the "Header/Payload Demux" is causing some issues.
Which issues are these?
Can you check the payload output of the HPD. It contains two tags: The
length of the packet in bytes (==100 in your case) (key: len_tag_key)
and the number of OFDM symbols (depends on your config, key is
frame_len_tag_key). Are these correct?
If yes, can you confirm that the stream tags were correct at the
transmitter? Can you post the argument for the vector_source?
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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