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Expectation value in matlab...need help

by florenti
Tags: expectation value
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florenti
#1
Apr9-12, 05:53 AM
P: 9
Hi,

as I am new in Matlab, so I need your help.

I want to replace the following inverse matrix (X'*X)^-1 with its expectation value:

E{(X'*X)^-1} = E{|1/Xk|^2}I

X'*X and (X'*X)^-1 is a diagonal matrix. Could anyone give me an Idea how to write it in matlab this expectation value. The elements of a matrix X are composed by QPSK symbols, or 16-QAM, or 64-QAM. Assume for now QPSK.

Assuming the same
signal constellation on all tones and equal probability on all constellation points.

Thanks in advande.
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florenti
#2
Apr10-12, 07:46 AM
P: 9
Still no help....


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