[Discuss-gnuradio] Question about OFDM and USRP

[Amr Youssef]

Hi all , i have a question , while i am transmitting OFDM through  USRP 2 board and receiving it  through another board  , USRP N210 , i received data after USRP source but after OFDM demod. block there is no thing received (demodulated) .
when i connected OFDM_demod to a vector sink , and then , when i displayed output of this vector sink , it was () , which means an empty buffer (or vector) and no thing is demodulated ..
What is the problem ? I need any help please .

Thanks in-advance

Amr,