Expectation value in matlab need help

  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. Still no help....
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