Hi all. I was reading about your implementation Siyu and i am trying to do the same (ieee802.11 over USRP B210 - intel i7) but i haven't been able to. Could you indicate me what you did. It would help me a lot.
I had overruns and i solved it by changing the transport parameters. I have the transceiver in only one pc. I run it and I try to do a ping but the ping just is received for the transceiver. It is not answered, then i don't achieved comunication. If you could share me your .grc file would be great too, if you maybe modified some important parameteres or something in the flowgraph. Thanks a lot. Best regards, Cristian 2017-05-09 16:37 GMT-05:00 Marcus Müller <marcus.muel...@ettus.com>: > Hi Siyu, > > well, transceiver performance depends effectively on bit error rate of the > underlying transport – and that error rate might be limited by noise, by > interference, or by effects like clipping and saturation, overly large > clock offset and much more. I'd say: add a time and a frequency sink to > your receiver flow graph, and watch the statistics! Analyze what might be > going wrong. In a first approach: Play with the TX and RX gains, carefully. > > To be completely honest, how well that transceiver works is something > no-one outside your lab can assess – you'll have to start diagnosing things > yourself :) > > Best regards, > > Marcus > > On 09.05.2017 22:11, zhan siyu wrote: > > Hi all, > > Recently, I bought two b210 usrps. And I just successfully setup the usrps > to run the gr-ieee802.11, written by Bastian. I used 2 desktops connected > to usrp and run the transceiver.py program. I can ping from one to the > other. I 'm so excited as I finally made it. However, I used the iperf to > test the throughput between two computers through the 802.11p. The result > is too low, only around 120kb/s , as shown by the log of iperf server side. > No overrun or underrun errors. The sample rate is 10M. The OS of my > computers is ubuntu 16 and cpu is i7. Also, the %cpu is only 310% as shown > by the top command. The distance between two usrps is about 0.5 meters. Is > the performance too low ? I think it should be much higher. But how can I > improve it ? Where is the bottleneck ? > > Can anyone help me ? Thanks ahead. > > Best Regards. > > Siyu > > > _______________________________________________ > Discuss-gnuradio mailing > listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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