Let $A(m,n)$, $B(n,k)$, $c(k,m)$ given complexe matrix, the objectif of the optimization problem is: \begin{equation} \mathop {\arg \min }\limits_X \left[ {{\lambda _{\max }}\left( {A + BXC} \right){{(A + BXC)}^H}} \right] \end{equation} Where $X$ is $(k,k)$ complex matrix