Mean square estimation of complex and normal data is not linear as in the real case but widely linear. The purpose of the paper is to calculate the optimum widely linear mean square estimate and to present its main properties. The advantage with respect to the linear procedure is especially analyzed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Picinbono et al. (1995) studied this question.
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