I apologize if I’m pointing you in the entirely wrong direction still but many display blocks expect an equal number of inputs at the same time. If you connect the source and output of the OFDM receiver to the BER block they will not have the same number of inputs because the receiver is dropping packets and the GUI block essentially freezes. Maybe post your flow graph for additional help? On Oct 4, 2020, at 10:06 AM, farhan pishe <farhan.pishe20@gmail.com> wrote:
Thank you for your reply.
That is not the point! Because the BER should decrease by increasing the SNR value for any modulation scheme, but it doesn't happen (even by omitting the CRC).
Regards, Farhan The OFDM simulations as written in the examples contain CRCs. I’ve tinkered with the OFDM examples a bit lately and while I may be completely mistaken I. believe the examples as written will only pass data that passes CRC so you may not actually ever see but errors.
Tim Barry, thank you so much for your time, but unfortunately, it wasn't helpful for me and still, I am seeking a way to plot the BER vs SNR. I don't know what is wrong with GNU Radio! Even it doesn't have complete documentation so that I can understand how to do things like this. I hope that someone guides me in a clear way. I want to plot a BER vs SNR for the OFDM simulation which already exists as one of the examples of GNU Radio, but it gives me constant line. Farhan,
I don't know much about BER curves, but this example may help you some:
https://github.com/gnuradio/gnuradio/blob/master/gr-fec/examples/ber_curve_gen.grc
Also search the archives of this newsletter. IIRC, there is a discussion
about the bus inputs.
Remember to CC discuss-gnuradio in your reply. I forgot on the first
time for this!
---
Barry Duggan KV4FV
https://github.com/duggabe
On Tue, 29 Sep 2020 00:00:51 +0330, farhan pishe wrote:
Hello,
I am trying to plot the BER vs Es/N0 using QT Bercurve Sink which has 16
inputs. But the result is always a constant line and I don't know the
reason and it is blowing my mind. Also, I don't know whether there is an
alternative way to plot BER vs SNR. I would really appreciate it if
anyone could help me in this regard. I just want to plot a simple bit
error rate curve.
Regards,
Farhan
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