Cross-correlating Two FFT signals

GNU Radio
1

Hello,

I’m trying to find a way that I could cross-correlate two FFT signals
that I have coming in from two UDP networks, anyone know of a block I
can do that with?

Thanks in advance,
Marcus

2

On 07/22/2014 04:02 PM, Ward, Marcus D. wrote:

Hello,

I’m trying to find a way that I could cross-correlate two FFT signals
that I have coming in from two UDP networks, anyone know of a block I
can do that with?

There’s no dedicated xcorr-block, but you can do a fast correlation
using FFTs and point-wise multiplication.

M

3

Thanks Martin, I’ll try that and also I don’t happen to see any Inverse
FFT blocks on Gnu-radio, is there a way I can do the IFFT on GNU-radio
since there is no block for it?

4

On 07/22/2014 01:32 PM, Ward, Marcus D. wrote:

Thanks Martin, I’ll try that and also I don’t happen to see any Inverse FFT
blocks on Gnu-radio, is there a way I can do the IFFT on GNU-radio since there is
no block for it?
The FFT block has a parameter that says “Forward” or “Reverse” (or
Inverse).

that I have coming in from two UDP networks, anyone know of a block I

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–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium