Hi Vladislav, Sorry for the late response, took me a minute to get through this:
On 03/28/2017 07:06 AM, Burning Dragon Productions - Vladislav wrote: > Hello, I am doing research where we are trying to implement TCP > through gnuradio and USRP B210s. > We want to use OFDM, so I have modified the ofdm_rx and ofdm_tx > examples into one large graph with a TUN/TAP interface and USRP > source/sink. Good approach! > Currently, I have the graph running on two separate Ubuntu 16.10 > machines with gnuradio 3.7.10 and UHD 3.11, talking through the > TUN/TAP interface. The graph seems to function normally except for the > fact that the other node fails to decode or even hear any OFDM frames. What's the "other" node? > The strange things is that when I disable the USRP source or sink on > one of the machines (one machine is TX and the other RX) then graph > works perfectly and packets decode without a hitch. But if on the > transmitting machine, I simply enable a USRP source and pipe it into a > null sink, the other machine will fail to decode packets. If I disable > the USRP source and null sink, then the other machine decodes packets. Ok, so if I understand this correctly, you have *two* identical receivers. Can you confirm? Best regards, Marcus
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