Re: [Discuss-gnuradio] Modifying C++ Files

[Samuel Ibarra]

Hello Ben,

 

Thank you for your help. I was able to get the result I wanted with the line of code you suggested. I was changing d_constellation[0] = gr_complex(-1,0) to d_constellation[0]= gr_complex(0,0). In order to demodulate my signal, I should be able to make the same change in the demodulator part of the code, correct? Thank you very much for your help and time.

 

Thanks

Sam

On Tue, Apr 10, 2012 at 7:09 PM, Ben Reynwar <address@hidden> wrote:

Hi Sam,

In bpsk.py you'll see the line

constellation = digital_swig.constellation_bpsk()

If you change this to:

constellation = digital.constellation_calcdist((1+0i, 0+0i), [], 1, 1)

, you should get the change in modulation you want.

You only need to mess with the digital_constellation.cc file if you
want to implement an efficient non-generic
decision maker for this modulation.

To know why what you're doing isn't working, I'd need to know what
modifications you're making to the .cc file.  It sounds like you're
doing everything right.

Cheers,
Ben

On Tue, Apr 10, 2012 at 11:34 AM, sibar002 <address@hidden> wrote:
>
> Hello,
>
> I am attempting to modify the bpsk.py file in order to obtain OOK
> modulation. I would like to change my constellation points to 1+0i and 0+0i.
> I understand that the digital_costellation.cc file is being used to set
> these parameters. I have tried to modify the digitial_constellation.cc file
> in the gr-digital folder, but I am not able to see any changes. I have made
> sure that I make and make install every time I change the file. I was hoping
> someone could tell me what I am doing wrong. I would greatly appreciate any
> help or advice that anyone could give me. Thank you for your time and help.
>
> Sam
>
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