Forum: GNU Radio transmiting a sequence of known bits using OFDM and file source

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On Thu, Dec 6, 2012 at 9:34 PM, jiajue ou <azalea.auau@yahoo.com.cn> 
wrote:

> Best,
>
> Jia
>


Jia,

Use this as a guide:
http://gnuradio.org/redmine/projects/gnuradio/wiki...

The file sources take the same structure of data and insert them into a
flowgraph.

Tom

Tom Rondeau wrote in post #1088538:
> On Thu, Dec 6, 2012 at 9:34 PM, jiajue ou
> wrote:
>
>> Best,
>>
>> Jia
>>
>
>
> Jia,
>
> Use this as a guide:
> 
http://gnuradio.org/redmine/projects/gnuradio/wiki...
>
> The file sources take the same structure of data and insert them into a
> flowgraph.
>
> Tom

Hi Tom,

Thanks for your reply. Does it mean if I put a “0” in the .txt file, 
“00000000” will be inserted to the flowgraph? (Byte I/O type is chosen.)

File Source(Byte, repeat)-->OFDM Mod-->OFDM Demod-->File Sink
In such a simple transceiver GRC loop test in a single computer,  I put 
one zero to the .txt in the File Source and  modified 
gnuradio/gr-digital/lib/digital_ofdm_frame_sink.cc to print real and 
imaginary part of “sigrot” (which I suppose is the received data complex 
symbols), the output, however, is not the corresponding symbols for 
repeated (00000000). So, am I wrong?
If I want to get the received complex symbols for my specific data? 
Which variables should I print out?
Thanks a lot!

Best,
Jia