I am trying to receive Dutch public broadcast DVB-T with gr-dtv/dvb-t.
The channel has the following parameters:
NPO 1:618000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_1_2:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:7011:7012:1101
I modified dvbt_rx_8k.grc to above parameters and cyclic prefix of 8192/4 = 2048.
Using a hackrf, I recorded 10 MS/s at 618 MHz. I added a resampler of 64/70 just like some USRP B210 example in gr-dvbt.
I added a a GUI Constellation Sink after the ODFM Symbol Acquisition + FFT to see what is going on.
If I generate a raw file using a modified dvbt_tx_8k.grc, this is correctly read in my modified dvbt_rx_8k.grc and on the extra constellation sync you see a pattern.
If I read the hackrf received file, the extra constellation sync will show things, but it does not look like a pattern, it looks a bit random noise.
It tried with both gnuradio 3.7.9 and the git head version.
Does anyone have experience receiving public DVB-T channels using gr-dtv?
Your help is much appreciated.