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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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