Distributed fusion estimation for multisensor systems with non-Gaussian but heavy-tailed noises. (June 2020)

• Record Type: Journal Article
• Authors: Yan, Liping; Di, Chenying; Wu, Q.M. Jonathan; Xia, Yuanqing; Liu, Shida
• Is Part Of: ISA transactions. Volume 101(2020)
• Page Start: 160
• Page End: 169
• Publication Date: 2020-06
• Subjects: State estimation -- Information filter -- Distributed fusion -- Non-Gaussian disturbance -- Heavy-tailed noise -- Multivariate t distribution; Engineering instruments -- Periodicals; Engineering instruments; Periodicals; Electronic journals; 629.805
• DOI: 10.1016/j.isatra.2020.02.004
• Languages: English
• ISSNs: 0019-0578

Abstract

Abstract: Student's t distribution is a useful tool that can model heavy-tailed noises appearing in many practical systems. Although t distribution based filter has been derived, the information filter form is not presented and the data fusion algorithms for dynamic systems disturbed by heavy-tailed noises are rarely concerned. In this paper, based on multivariate t distribution and variational Bayesian estimation, the information filter, the centralized batch fusion, the distributed fusion, and the suboptimal distributed fusion algorithms are derived, respectively. The centralized fusion is given in two forms, namely, from t distribution based filter and the proposed t distribution based information filter, respectively. The distributed fusion is deduced by the use of the newly derived information filter, and it has been demonstrated to be equivalent to the centralized batch fusion. The suboptimal distributed fusion is obtained by a parameter approximation from the derived distributed fusion to decrease the computation complexity. The presented algorithms are shown to be the generalization of the classical Kalman filter based traditional algorithms. Theoretical analysis and exhaustive experimental analysis by a target tracking example show that the proposed algorithms are feasible and effective. Highlights: Information filter for linear systems with heavy-tailed noises is deduced. Centralized fusion (CF) for heavy-tailed multisensor systems is presented. Distributed fusion (DF) for heavy-tailed multisensor systems is presented. The presented DF is proven to be equivalent to the CF. The proposed algorithms are the generalization of Kalman filter based algorithms.