Re: [Discuss-gnuradio] OFDM on USRP2

[Morgan Redfield]

On Thu, Jun 9, 2011 at 1:24 AM, vanITA1082 <address@hidden> wrote:
>
> Thank you!
>
> I found 2 errors in benchmark_ofdm_tx.py:
>
> line 63 should be "sink"
> line 69 should be "samp_rate"
>
> Thanks again
> Vanessa
>
>

Hi Vanessa,

One thing you might also have to change is the tx-amplitude in
transmit_path.py. I wasn't having any success until I changed the
range from 0 <= AMPL < 32768 to 0 <= AMPL <= 1.

I'm interested in whether you have any success with this. I'm
currently able to send something that looks like OFDM, but unable to
demodulate it.

Thanks,
Morgan


> Nick Foster-4 wrote:
>>
>> On Wed, 2011-06-01 at 00:50 -0700, vanITA1082 wrote:
>>> Yes, but they do not work with UHD which is the only way to use my USRP
>>> N210
>>
>> I just pushed a branch with UHD versions of the OFDM apps:
>>
>> git://github.com/bistromath/gnuradio.git
>>
>> It's in the uhd_ofdm branch. This is untested code, so use at your own
>> risk. I just wanted to illustrate to people how easy it is to move stuff
>> over to UHD. Check the git diffs for a guide on the things that change.
>> Basically the largest change is saying "uhd.usrp_source" instead of
>> "usrp_source", and use sample rate instead of decimation/interpolation
>> factors. These changes apply to ALL the USRP examples, not just the OFDM
>> stuff.
>>
>> Note that this doesn't fix any lingering bitrot which may be in there --
>> I haven't tried the OFDM examples in a while. I'll get a chance to test
>> them in a day or so.
>>
>> --n
>>
>>>
>>>
>>> Marcus D. Leech wrote:
>>> >
>>> > On 05/31/2011 10:15 AM, vanITA1082 wrote:
>>> >> Thanks.
>>> >>
>>> >> However we are trying to transmit a packet from a usrp n210 to another
>>> >> usrp
>>> >> n210 and we are searching for examples do to this simple operation.
>>> >>
>>> >> How is it possible that are not out there? Do you know any source of
>>> >> simple
>>> >> examples?
>>> >>
>>> >>
>>> >> Thanks
>>> >>
>>> >> Vanessa
>>> >>
>>> >>
>>> > Dont know what state they're in:
>>> >
>>> > ./gnuradio-examples/python/ofdm
>>> > ./gnuradio-examples/python/ofdm/ofdm_mod_demod_test.py
>>> > ./gnuradio-examples/python/ofdm/plot_ofdm.m
>>> > ./gnuradio-examples/python/ofdm/ofdm_sync.m
>>> > ./gnuradio-examples/python/ofdm/benchmark_ofdm_rx.py
>>> > ./gnuradio-examples/python/ofdm/benchmark_ofdm_tx.py
>>> > ./gnuradio-examples/python/ofdm/gr_plot_ofdm.py
>>> > ./gnuradio-examples/python/ofdm/benchmark_ofdm.py
>>> > ./gnuradio-examples/python/ofdm/ofdm_sync_pn.m
>>> >
>>> >
>>> >
>>> >>>
>>> >
>>> >
>>> > --
>>> > Marcus Leech
>>> > Principal Investigator
>>> > Shirleys Bay Radio Astronomy Consortium
>>> > http://www.sbrac.org
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > Discuss-gnuradio mailing list
>>> > address@hidden
>>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>> >
>>> >
>>>
>>
>>
>>
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