. This paper considers the mix-norm / standard problem. Specifically an LQG control design problem involving a constraint on  disturbance attenuation is addressed. It is shown that the / dynamic compensator gains are completely characterized via coupled Riccati/Lyapunov equation. The principle result involves sufficient condition for characterizing full order guaranteeing closed loop stability, constrained  disturbance attenuation and an optimized  performance bound.
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