Re: [Discuss-gnuradio] How to calculate BER in different modulations with OFDM using GNURadio Companion

[Marcus Müller]

Hi Antonio,

I think this is a revival of an older thread.

I still can't execute your flow graph, because it seems to be built with an old version of GNU Radio (probably 3.6.X?).
Using that really doesn't make sense for OFDM experimentation, because the new, much cooler and better-working OFDM blocks are not available there.
I *strongly* recommend updating your GNU Radio installation.

Also, I think all information you gave in this mail was already there in previous mails of you. Don't write such emails; people will start considering you as spammer if you don't include what you've tried since the last time you've got responses to your mails. Always try to represent the latest state. For example, I already told you that your GNU Radio is too old and we can't work with your flow graphs. You did not even react to that...

Best regards,
Marcus

On 09.09.2015 20:28, ANTONIO TAMAYO wrote:

Hello,

 I'm doing my College final project about gnuradio companion. I have to calculate the BER with OFDM using different modulations to the subcarriers. After that, I have to do a graphic with the BER numbers. The configuration I use is in the images attached.

Specifically, I have to send an image and after that I have to calculate the BER. Also, I need to send an random vector and calculate the BER in the same way as with the image. The image that I send in the example is called "imagen" and it's attached in this email.

When I'm using GRC to calculate BER I always have the same problem. First I try to simulate without introducing any noise and get a BER data. Then I try to introduce AWGN noise and the BER data is the same. Clearly I'm making a mistake, but I'm not able to identify what it is. In view of the configuration used, someone could tell me which are my mistakes?

Also, I would like to know how to configure the block Channel Model correctly.

Thank you all.

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