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Diffusion Correntropy Subband Adaptive Filtering (SAF) Algorithm over Distributed Smart Dust Networks

by Ying Guo 1, Jingjing Li 1 and Yingsong Li 2,3,*
1
School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
2
College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
3
Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing 100190, China
*
Author to whom correspondence should be addressed.
Symmetry 2019, 11(11), 1335; https://doi.org/10.3390/sym11111335
Received: 6 September 2019 / Revised: 7 October 2019 / Accepted: 18 October 2019 / Published: 26 October 2019
The diffusion subband adaptive filtering (DSAF) algorithm has attracted much attention in recent years due to its decorrelation ability for colored input signals. In this paper, a modified DSAF algorithm using the symmetry maximum correntropy criterion (MCC) with individual weighting factors is proposed and discussed to combat impulsive noise, which is denoted as the MCC-DSAF algorithm. During the iterations, the negative exponent in the Gaussian kernel of the MCC-DSAF eliminates the interference of outliers to provide a robust performance in non-Gaussian noise environments. Moreover, in order to enhance the convergence for sparse system identifications, a variant of MCC-DSAF named as improved proportionate MCC-DSAF (MCC-IPDSAF) is presented and investigated, which provides a dynamic gain assignment matrix in the MCC-DSAF to adjust the weighted values of each coefficient. Simulation results verify that the newly presented MCC-DSAF and MCC-IPDSAF algorithms are superior to the popular DSAF algorithms. View Full-Text
Keywords: diffusion subband adaptive filtering algorithm; maximum correntropy criterion; impulsive noise; proportionate adaptive filters; sparse system identifications diffusion subband adaptive filtering algorithm; maximum correntropy criterion; impulsive noise; proportionate adaptive filters; sparse system identifications
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Guo, Y.; Li, J.; Li, Y. Diffusion Correntropy Subband Adaptive Filtering (SAF) Algorithm over Distributed Smart Dust Networks. Symmetry 2019, 11, 1335.

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