How to properly use symtrack?

[kayakaan02]

So I've been trying to use symtrack on some .wav file I created, it contains an ASCII converted message.

I get the samples on a liquid_float_complex array, but it doesn't seem to work for me, Is it something that I do wrong here?

I scatterplot() the symtrack applied samples' symbols on octave:

rest of the code is include and storing the samples in array x

[jgaeddert]

Without any information on the input signal, it's impossible to really respond to this. Can you please give some context here?

[kayakaan02]

Shouldn't it look like this?

[jgaeddert]

Sorry for the late response. I don't have a license for MATLAB so I can't run this. If you could just send a data file (fine to email me a small one, or upload to google drive for a larger one) I can maybe take a look.

[jgaeddert]

Well, without a data file it's hard to answer, but in general you're using it correctly. A few recommendations:

1. Shorten your filter; a delay of more than 100 symbols is overkill. I would recommend something like m=12 to start with.
2. Looks like you're in C++ here; you can use std::complex<float> directly, and don't have to specify the intermediate liquid_float_complex type
3. If you only care about symbol timing recovery, consider using symsync_crcf (timing recovery only) instead of symtrack_cccf (timing, carrier frequency/phase, and equalization).

[kayakaan02]

Without any information on the input signal, it's impossible to really respond to this. Can you please give some context here?

@jgaeddert sorry, I created the file in matlab, here's the code and everything;

testPSK.zip