Event-triggered H∞,filtering over wireless sensor networks under unknown periodic DoS jamming attacks

This paper investigates event-triggered H-infinity, filtering problem over wireless sensor networks under unknown periodic Denial-of-Service (DoS) jamming attacks. Firstly, a novel event-triggered mechanism is introduced to determine whether sensor's current sampled-data should be transmitted to reduce the communication burden for filter design. Secondly, based this event -triggered scheme, the filtering error system, which includes the unknown periodic DoS jamming attacks, is transformed into a switched system. By using time-viuying Lyapunov-krasovskii functional method, sufficient conditions are derived such that the filtering error system is globally exponential stability(GES) and satisfies the prescribed H-infinity, performance. Thirdly, the co-design method for the filter parameters and triggering parameters can be formulated by solving a set of LMIs. Finally, the effectiveness of the proposed method is demonstrated by a practical example.