Re: [Discuss-gnuradio] OFDM on USRP2

[vanITA1082]

I am going more deeply into the OFDM example, however I cannot figure out
which is the bit rate of the usrp. 
I mean, I know and I can set the bit rate of my application but how fast the
packets are sent out by the usrp?
How can I evaluate the throughput on the wireless link?

Thanks

Vanessa



Morgan Redfield-2 wrote:
> 
> 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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>>>
>>
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