Working with the OFDM code without USRPs

GNU Radio
1

Hi,

I tried to communicate between the OFDM code without the USRPs, doing:

  • from the ‘benchmark_ofdm_tx.py’ saved the output to the
    ‘gr.file_sink’, instead of giving it to ‘usrp.sink_c’
  • from the ‘benchmark_ofdm_rx.py’ read from the file with
    ‘gr.file_source’, instead of receiving it from the ‘usrp_source_c’.

And I wanted to see the same result, as I see from the standard
‘benchmark_ofdm_tx.py’ and ‘benchmark_ofdm_rx.py’ with USRPs,

but there’s no response from the ‘benchmark_ofdm_rx.py’, when I read the
signal from the file.

Could anyone give me hint, why it’s like that?

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2

On Tue, Apr 22, 2008 at 7:06 AM, Hoo-chang Shin [email protected]
wrote:

  • from the ‘benchmark_ofdm_tx.py’ saved the output to the ‘gr.file_sink’, instead of giving it to ‘usrp.sink_c’
  • from the ‘benchmark_ofdm_rx.py’ read from the file with ‘gr.file_source’, instead of receiving it from the ‘usrp_source_c’.

You need to ensure that the data written to the file is at the same
sampling rate as is expected by the other program. I’m not sure if
you get this for free by making the above substitutions in the
flowgraph.

–
Johnathan C.
Corgan Enterprises LLC
http://corganenterprises.com/