Re: [Discuss-gnuradio] Role of Clock Recovery in communication in SDR based application?

[Ron Economos]

The "O" being printed means "overflow". Every time there is an overflow, samples are lost and the DVB-T OFDM Symbol Acquisition block will detect that and restart the acquisition.

Some options:

1) Use a more powerful computer.

2) Reduce the sample rate. Instead of using an 8 MHz channel, try 6 MHz.

3) Use QPSK instead of 16QAM or 64QAM.

Also, the DVB-T receiver has been integrated into GNU Radio itself and the OFDM Symbol Acquisition block has been enhanced over the one in gr-dvbt. Example flow graphs are in:

<install_dir>/share/gnuradio/examples/dtv

Ron

On 06/10/2017 12:16 AM, Stack Programer wrote:

we can Transmit in gnuradio with HackRF One DVB-T signal successfully, we can see video with dongle DVB-T player in hardware base method.But for receiving DVB-T signal with SDR based in gnuradio we have these errors:

DVBT project receiver probelm OOrestart aquisition d_freq_offset: -5 Od_freq_offset: -5

My Qeustion  is In SDR Hardware SDR should do these task or in Software Enviroment In gnuradio we should myself do clock recovery methods? Any one that same problem welcome to discussing for solving DVB-T signal receiving with HackRF one.