We derive conditions for quadratic stabilizability of linear networked control systems (LNCSs) by dynamic output feedback and communication protocols. We use these conditions to develop a simultaneous design of controllers and protocols in terms of matrix inequalities. The obtained protocols do not require knowledge of controller and plant states but only of the discrepancies between current and the most recently transmitted values of nodes' signals, and are implementable on control area

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... s. We show on a batch reactor example that our design guarantees quadratic stability (QS) with a significantly smaller network bandwidth than previously available designs.