“…If the obtained system of inequalities ( 11)-( 14), (19), and (20) has a solution, then the estimator (16) designed for system (4) satisfies the condition of suboptimality in the sense of the anisotropic norm. The optimization problem can be stated as follows: γ 2 −→ min over ( 11)-( 14), (19) and (20) w.r.t. R k , R k , X k , X k , η 2 , Ψ k , γ 2 1 , γ 2 2 , τ.…”