title: A Robust Diffusion Estimation Algorithm with Self-Adjusting Step-Size in WSNs.
abstract: In wireless sensor networks (WSNs), each sensor node can estimate the global parameter from the local data in a distributed manner. This paper proposed a robust diffusion estimation algorithm based on a minimum error entropy criterion with a self-adjusting step-size, which are referred to as the diffusion MEE-SAS (DMEE-SAS) algorithm. The DMEE-SAS algorithm has a fast speed of convergence and is robust against non-Gaussian noise in the measurements. The detailed performance analysis of the DMEE-SAS algorithm is performed. By combining the DMEE-SAS algorithm with the diffusion minimum error entropy (DMEE) algorithm, an Improving DMEE-SAS algorithm is proposed for a non-stationary environment where tracking is very important. The Improving DMEE-SAS algorithm can avoid insensitivity of the DMEE-SAS algorithm due to the small effective step-size near the optimal estimator and obtain a fast convergence speed. Numerical simulations are given to verify the effectiveness and advantages of these proposed algorithms.
authors.affiliation: College of Electronic and Information Engineering, School of Mathematics and Statistics, Southwest University, and Key Laboratory of Nonlinear Circuits and Intelligent Information Processing, Chongqing 400715, China. xiaodanshao3@126.com.|College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China. xiaodanshao3@126.com.
authors.forename: Xiaodan
authors.initials: X
authors.lastname: Shao
authors.affiliation: College of Electronic and Information Engineering, School of Mathematics and Statistics, Southwest University, and Key Laboratory of Nonlinear Circuits and Intelligent Information Processing, Chongqing 400715, China. fengchenmit@swu.edu.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China. qingye6@126.com.
authors.forename: Qing
authors.initials: Q
authors.lastname: Ye
authors.affiliation: College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China. duansk@swu.edu.cn.
authors.forename: Shukai
authors.initials: S
authors.lastname: Duan
keywords: non-Gaussian noise; robust diffusion estimation; self-adjusting step-size; wireless sensor networks