摘要
This paper is concerned with the problem of finitehorizon energy-to-peak state estimation for a class of networked linear time-varying systems.Due to the inherent vulnerability of network-based communication,the measurement signals transmitted over a communication network might be intercepted by potential eavesdroppers.To avoid information leakage,by resorting to an artificial-noise-assisted method,we develop a novel encryption-decryption scheme to ensure that the transmitted signal is composed of the raw measurement and an artificial-noise term.A special evaluation index named secrecy capacity is employed to assess the information security of signal transmissions under the developed encryption-decryption scheme.The purpose of the addressed problem is to design an encryptiondecryption scheme and a state estimator such that:1)the desired secrecy capacity is ensured;and 2)the required finite-horizon–l_(2)-l_(∞)performance is achieved.Sufficient conditions are established on the existence of the encryption-decryption mechanism and the finite-horizon state estimator.Finally,simulation results are proposed to show the effectiveness of our proposed encryption-decryption-based state estimation scheme.
基金
This work was supported in part by the National Natural Science Foundation of China(62273087,61933007,62273088,U21A2019,62073180)
the Shanghai Pujiang Program of China(22PJ1400400)
the Program of Shanghai Academic/Technology Research Leader of China(20XD1420100)
the European Union’s Horizon 2020 Research and Innovation Programme(820776)(INTEGRADDE)
the Royal Society of UK
the Alexander von Humboldt Foundation of Germany.