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Generating 2D autocorrelation matrix

Generating 2D autocorrelation matrix

Generating 2D autocorrelation matrix

(OP)
Hi,

I would like to generate the autocorelation matrix of the signal:

CODE

x=randn(1,1000);

At the moment I am using::

CODE

Rxx=xcorr(x,'unbiased');

But this is only giving me a 1-dimensional autocorrelation sequence of size 1x1999(2N-1). But I would like the full 2D square autocorrelation matrix.

ie. Rxx = E{xxT}  where T=transpose

Is this possible?

Thanks for your time,

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