Optimal performance for communication networked systems with QoS constraints

In this paper, we investigate the optimal performance for multiple-input multiple-output (MIMO) communication networked system under the QoS constraints through tracking a unit step signal. The expression of optimal performance for MIMO communication networked system is obtained by using of co-prime factorization, partial factorization, and spectral decomposition. It is shown that the optimal tracking performance is closely related to the nonminimum phase zeros and unstable poles of the plant, determined by their locations and directions. We also demonstrated that packet dropout and network-induced delay may degenerate the optimal tracking performance and encoder-decoder can be designed to improve the systems tracking ability. Some typical examples are given to illustrate the theoretical results.