DVB-T receiving

Hello,

Once again I am asking for some help with the DVB-T functionality of GNU radio.

I am using complex binary files recorded with a USRP at 10 Ms/s. The DVB-T rx example chain can't decode it at all. I have changed every setting according to Hungarian transmit parameters (64QAM, 1/4 GI, 3/4 code rate etc.).

I think the problem might be with symbol acquisition, but cant really confirm my suspicion.

Below you can see the signal I am talking about. Could it be that for this type of synchronization this SNR is not sufficient?

Thanks,
András Szilassi