Re: [Discuss-gnuradio] OFDM on USRP2

[Nick Foster]

On Thu, 2011-06-09 at 01:24 -0700, vanITA1082 wrote:
> Thank you!
> 
> I found 2 errors in benchmark_ofdm_tx.py:
> 
> line 63 should be "sink"
> line 69 should be "samp_rate"

Thanks. In addition, check out the messages Morgan Redfield just posted,
he found that the transmit_path multiplier should be reduced since UHD
expects amplitudes <1.0 while gr-usrp expects amplitudes up to +32767.
This is lines 66-67 of transmit_path.py.

--n

> 
> Thanks again
> Vanessa
> 
> 
> 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
> >> > 
> >> > 
> >> > 
> >> > _______________________________________________
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> >> > address@hidden
> >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >> > 
> >> > 
> >> 
> > 
> > 
> > 
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> > 
>