Re: [Discuss-gnuradio] (no subject)

[Marcus Müller]

Hi Rafik!

So, what's wrong with the BER and the SNR estimate?

Best regards,

Marcus

On 07/03/2017 11:29 PM, Rafik ZITOUNI wrote:

Dear all, 

I translate the /gr-digital/examples/narrowband/digital_bert_tx.py and the /gr-digital/examples/narrowband/digital_bert_rx.py python source codes to GRC flow graphs. The objective is to get more graphical possibilities with a GRC.  My flow graph gives a fine result of BER and SNR for DBPSK modulation. 

The problem is with the rotating points of my constellation. I think that the rotation of my view comes from a lack of frequency synchronization, but why I obtained a correct BER and SNR?

You find attached to this message a constellation view obtained by my flow graph. 

Please could you explain me this  result or give an advice to improve the obtained result? 

Regards, 

--

Rafik

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