[Discuss-gnuradio] OFDM tranceiver not responding as intended on USRP2

[pradeep]

Hi All,

I am implementing a OFDM tranceiver. I am following the benchmark.py and 
tunnel.py for achieving it. I am facing the following problems while 
performing receive--> transmit--> receive:

1.It receives on the startup of the code.
2.It transmits and then it does not receive at all.

I have tried:

1. Creating separate thread for send the packet. I am using the queues 
to accumulate the data to be sent and then the queued data is 
transmitted by the send packet thread. This thread will inturn call 
_pkt_input.msgq().insert_tail(msg) in the ofdm_mod class to send the 
data on the msgq. Even this did not solve my problem
2. Debugging the code by using logs. This clearly shows that, once it 
transmits it does not receive at all. If it does not transmit even once 
then it can receive the data.
3. I have used file sinks just after the usrp2_source. The size of the 
file indicates that it is receiving the data even after transmission. 
But for some reason it is not being demodulated. Does this transmission 
change the receiving parameters?

Can someone please help me to figure out whats going on?

*
Thanks and Regards,
Pradeep Nagaraju*