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Expectation value in matlab need help

  1. Apr 9, 2012 #1
    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.
     
  2. jcsd
  3. Apr 10, 2012 #2
    Still no help....
     
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