Tuesday, April 29, 2025

Re: Modifying BPSK to QPSK

Richard,
Thank you for the guidance. I believe I have made all the necessary changes to the modulation and synchronization technique.
BSPK Flowgraph (working):

QPSK Flowgraph (not working):


If you have anything for me to try or experiment with please let me know.
Thanks,
Zach


On Thu, Apr 24, 2025 at 1:27 PM Richard Bell <richard.bell4@gmail.com> wrote:
Hi Zachary,

You will have a better chance of getting responses if you post screenshots of your flowgraph instead of attaching grc files themselves. People can't open grc files on their phones or on the go. 

I have not opened your grc files, have you made the proper change to the synchronization technique you are using to account for the change in modulation type from 2 symbols to 4 symbols? That's the first place my mind went that would cause problems.

Rich

On Wed, Apr 16, 2025 at 5:53 AM Zachary Naymik <znaymik@mti-systems.com> wrote:
Hello all,
I am reaching out again as I am trying to modify a working file transmission using BPSK to work using QPSK. I have made all the modifications I believe to be necessary to get the transmission to work with QPSK, however I am unable to see any results. I have debugged this for many hours and am reaching out to see if anyone has any insight. Please let me know if you have any questions, the flowgraphs are attached.

Thanks,
Zach

--

Zach Naymik | Software Engineer 

 e: znaymik@MTi-Systems.com  p: 330-931-9945

 https://mti-systems.com

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--

Zach Naymik | Software Engineer 

 e: znaymik@MTi-Systems.com  p: 330-931-9945

 https://mti-systems.com

A black background with a black square    Description automatically generated

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