Characterization of discrete time H/sub infinity / controllers via bilinear transformation

A unified state space approach using bilinear transformation is proposed for continuous/discrete time H/sub infinity / optimal control problems. It is shown that Riccati equations and related factorizations of continuous time and discrete time systems can be formulated by the same Hamiltonian matrices. All H/sub infinity / sub-optimal compensators for continuous and discrete time systems are parametrized in a completely parallel way. >