Re: [Discuss-gnuradio] Simple signal processing

[Charles Hearn]

Hey, just wondering if anyone could point in the right direction on just how to write a block that will write out a feature like instantaneous carrier phase to stdout.  I've read all the tutorials on the website and can't seem to find anything that would fit this scenario.  I tried going through the code for some of the modulation blocks, but couldn't see how they received the phase data for something like phase modulation.

On Wed, Apr 24, 2013 at 1:37 PM, Charles Hearn <address@hidden> wrote:

I'm new to working on gnuradio (experience operating it with a usrp but not developing for it) so hopefully someone can help me out a bit here.

I want to write a module to compare different signals, looking for differences in a few factors by passing some signal features over time to a python program.  To do this, should I write a sync block in C++ (or possibly multiple sync blocks) that will keep a long history and output a vector of the amalgamated features at some point to a python top block for evaluation?

For instance, I want to read the instantaneous phase, frequency, and amplitude of a signal at the same time and output each of these to a python app, where I do some more work and then stop.  I have looked through the gnuradio utilities and don't see many blocks/utilities that I could use just to read something like instantaneous phase and pass that along.

Any help is appreciated, thanks.

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Charles Hearn

University of Virginia 2013

Bachelor of Arts, Computer Science