中文摘要：

基于通信约束，研究了单输入单输出网络化控制系统的最优跟踪性能问题，白噪声在前向通道和反馈通道的影响也同时被考虑，得到了一些新的结论：最优跟踪性能由给定对象的不稳定极点、通信编码方法和信道白噪声决定，该结论进一步说明通信编码方法和信道白噪声是如何限制网络化控制系统跟踪能力．如果不考虑通信的影响，控制系统的最优跟踪性能就与已有的结论相同．仿真结果验证了该结论的正确性．

英文摘要：

The optimal tracking performance problem of single-input-single-output （SISO） networked control system with communication constraints is studied. The white noise in the forward channel and the feedback channel is considered simul- taneously, and some new results are obtained： the optimal tracking performance depends on the unstable poles of the given plant, as well as the channel coding methods and white noise. They also show how the control system＇s tracking capability is constrained by the channel coding method and white noise in the communication channel. The optimal tracking performance reduces to the existing tracking performance of the control system without communication constraints. Simulation results illustrate the correctness of the results.