Cross correlation of complex signals in gnuradio

GNU Radio
1

hi,
I want to cross-correlate two complex signals in gnuradio. is there a
block
to do that?

Thanks

2

On 09/06/2010 06:17 PM, John A. wrote:

hi,
I want to cross-correlate two complex signals in gnuradio. is there a
block to do that?

Thanks

Something other than a complex multiply?

That’s what I do for my simple, correlating, interferometer. Just
multiple the two signals together.

3

On Mon, Sep 6, 2010 at 7:30 PM, Marcus D. Leech [email protected]
wrote:

Something other than a complex multiply?

That’s what I do for my simple, correlating, interferometer. Just multiple
the two signals together.

Not a native block, as such, but you’ll find a good python
implementation in correlator.py here (I hope Martin D. doesn’t mind
posting a link to a directory in his website here…):
http://www.olifantasia.com/projects/gnuradio/mdvh/passive_radar/

Comments have some documentation, but it basically does frequency
domain correlation (the FFT * conj of FFT-> IFFT thing) and works with
complex signals. I’ve played with it a bit and it seems to work pretty
well.

Kunal

4

Hi,
I´m trying to use the correlator.py Code from Index of /projects/gnuradio/mdvh/passive_radar with Gnuradio. I installed Octave, copied the Code, (cmake …/, make, …) went well, but I have some trouble with the XML-Code for my Correlator-Block.
Does anybody have the XML-Code for this Block or knows how to write it?

5

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