XF Correlator in GNU Radio

[Juan Manuel]

Would like to know if anyone has a GNU Radio flowchart from an XF correlator, it may be something basic but useful. The idea is to test it on a test bench but I don’t have time to design it from scratch

[David Lonard]

I couldn't find a direct example for a Gnuradio XF correlator, but I did find a link for an FX correlator.

https://www.philipzucker.com/gnuradio-delay-correlation/

By changing the first set of FFTs from 'forward' to 'reverse' followed by the multiplication of conjugate of one of the two signals, one would then have an XF correlator.

I still prefer a FX correlator, since it is possible to excise RFI in offending channels followed by an IFFT to find signal delays. Some of my early posts on this group cover how to do this in Python.

In Gnuradio, editing out RFI could be hard to accomplish.

David

[Juan Manuel]

Thanks David, the idea of ​​the XF correlator is to perform some tests as part of my degree project, I also have an FX correlator but the idea is to test several types.

What I want to achieve in the first instance with the XF correlator is to correct the challenger with respect to the reference signal so that I can apply the correlation.

Juan.