Event-Triggered State Estimation for Wireless Sensor Network Systems With Packet Losses and Correlated Noises

Abstract

In this article, an event-triggered state estimation problem for wireless sensor network systems affected by random packet losses and correlated noises is considered. A set of independent Bernoulli variables are used to describe the random packet losses in the measurement transmission. An event-triggered transmission strategy is introduced to decrease limited network bandwidth consumption, and the measurement noise is correlated with the process noises of the same moment and the previous moment. Event-triggered estimator of process noises under the linear minimum variance criterion is derived. Then, an event-triggered state estimation algorithm related to the packet loss rate, noise correlation coefficient and triggering threshold is designed. Sufficient conditions are provided to guarantee convergence of the estimation error covariances of the proposed estimator. Finally, comparative simulation verifies the effectiveness of our algorithm.

Event-Triggered Distributed Fusion Estimator for Asynchronous Markov Jump Systems with Correlated Noises and Fading Measurements

“…Furthermore, based on [ 28 ], a noise estimator is proposed in [ 29 ] to enhance the accuracy of their systems, and a suboptimal estimator is also proposed to reduce the amount of computation. In [ 30 ], an ET-based state estimator for wireless sensor networks is proposed, which is affected by packet loss and CNs. In [ 31 ], a variance-based ET mechanism is studied, and the switching Riccati equation of its estimator can be calculated offline to determine whether to transmit the measurement data.…”

A Learning Approach for Joint Design of Event-Triggered Control and Power-Efficient Resource Allocation

“…Moreover, the analysis of the event-triggered control becomes too complicated when the volatile properties of wireless communication such as delay, limited resources, packet drops, and unreliable links are considered. The design of the event-triggered control in the presence of unreliable links and packet losses has been recently drawn a lot of attention [11,12,13]. However, in addition to packet drops, there exist many other features of wireless communication, such as the delay and limited resources, which make a direct impact on the stability and performance of control sub-systems.…”