Dear Tom, Do you mind sharing your code for usrp n210 ?
I am new on gnuradio and usrp and I am not able to find a python example to perform packet transmission. Thank you Vanessa Tom Rondeau wrote: > > On Mon, Jan 17, 2011 at 2:48 PM, Josh Blum <[email protected]> wrote: >> >> >> On 01/17/2011 11:31 AM, Veljko Pejovic wrote: >>> Hi, >>> >>> I updated the OFDM example. You can find it at >>> http://www.cs.ucsb.edu/~veljko/downloads/ofdm_example.tar.gz >>> >>> It supports both USRPs and the UHD driver. I get pretty bad >>> performance with UHD receiver for some reason. Any ideas? >>> >> >> For the UHD performance issue, which model usrp? The following applies >> to usrp2: >> >> Was the bad performance on a transmit + receive application? There was >> an issue where if receive was not keeping up, the transmit flow control >> could be hampered; this is fixed on next branch. >> >> Or was it receive only? And in any case did UHD print and warnings about >> buffer sizes? Because it needs sysctl permission to allocate a large >> enough receive buffer. >> >> -josh > > > I found issues with the UHD code in setting the sample rates. When you > set the sample rate, the best thing to do is ask the UHD device what > the real sample rate it was actually set to. I then use a PFB arb > resampler to adjust to the actual sample rate that I want. > > I was playing around with some FM signals and found that I couldn't > get anything clean out until I did this, even though I was setting > what I thought was a standard sample rate (that is, an integer > decimation of the clock) to my N210. What I asked for and what I set > were only off by a little bit, but it makes a huge difference in > performance for FM signals. > > That said, we should be adjusting for this in the OFDM code, but it's > something to keep in mind. > > Tom > > >>> >>> Cheers, >>> >>> >>> Veljko >>> >>> >>> On Tue, Jan 11, 2011 at 9:26 PM, Guanbo <[email protected]> wrote: >>>> >>>> Hi, >>>> >>>> I was looking for the source codes through the list. >>>> And I got one from Veljko from UCSB, who are very nice to share his >>>> codes, >>>> "ofdm_example.tar.gz" >>>> The codes are attached. >>>> Given the enough gain in TX and RX, you can see the output result at >>>> RX. >>>> >>>> Guanbo >>>> http://old.nabble.com/file/p30650478/ofdm_example.zip ofdm_example.zip >>>> >>>> >>>> mrahaim wrote: >>>>> >>>>> >>>>> Hi all, >>>>> >>>>> Does anyone know of any updated OFDM benchmark code that is modified >>>>> to >>>>> be run on a USRP2? I have seen previous posts of this, however the >>>>> link to the updated code is no longer available. >>>>> >>>>> Thanks, >>>>> >>>>> Michael Rahaim >>>>> Graduate Research Assistant >>>>> Smart Lighting Engineering Research Center >>>>> Boston University >>>>> [email protected] >>>>> >>>>> >>>>> _______________________________________________ >>>>> Discuss-gnuradio mailing list >>>>> [email protected] >>>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>>> >>>>> >>>> >>>> -- >>>> View this message in context: >>>> http://old.nabble.com/OFDM-on-USRP2-tp30638994p30650478.html >>>> Sent from the GnuRadio mailing list archive at Nabble.com. >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> [email protected] >>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> [email protected] >>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/OFDM-on-USRP2-tp30638994p31715444.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
