Publication detail

A Weighted Gaussian Kernel Least Mean Square Algorithm

MOINUDDIN, M. ZERGUINE, A. ARIF, M.

Original Title

A Weighted Gaussian Kernel Least Mean Square Algorithm

Type

journal article in Web of Science

Language

English

Original Abstract

In this work, a novel weighted kernel least mean square (WKLMS) algorithm is proposed by introducing a weighted Gaussian kernel. The learning behavior of the WKLMS algorithm is studied. Mean square error (MSE) analysis shows that the WKLMS algorithm outperforms both the least mean square (LMS) and KLMS algorithms in terms of transient state as well as steady-state responses. We study the effect of the weighted Gaussian kernel on the associated kernel matrix, its eigenvalue spread and distribution, and show how these parameters affect the convergence behavior of the algorithm. Both of the transient and steady-state mean-square-error (MSE) behaviors of the WKLMS algorithm are studied, and a stability bound is derived. For a non-stationary environment, tracking analysis for a correlated random walk channel is presented. We also prove that the steady-state excess MSE (EMSE) of the WKLMS is Schur convex function of the weight elements in its kernel weight matrix and hence it follows the majorization of the kernel weight elements. This helps to decide which kernel weight matrix can provide better MSE performance. Simulations results are provided to contrast the performance of the proposed WKLMS with those of its counterparts KLMS and LMS algorithms. The derived analytical results of the proposed WKLMS algorithm are also validated via simulations for various step-size values.

Keywords

Kernel methods, Least mean square, Reproducing kernel Hilbert space, Gaussian kernel, Kernel adaptive filtering

Authors

MOINUDDIN, M.; ZERGUINE, A.; ARIF, M.

Released

23. 4. 2023

ISBN

0278-081X

Periodical

CIRCUITS SYSTEMS AND SIGNAL PROCESSING

Year of study

42

Number

9

State

United States of America

Pages from

5267

Pages to

5288

Pages count

22

URL

https://link.springer.com/article/10.1007/s00034-023-02337-y

BibTex

@article{BUT185125,
  author="MOINUDDIN, M. and ZERGUINE, A. and ARIF, M.",
  title="A Weighted Gaussian Kernel Least Mean Square Algorithm",
  journal="CIRCUITS SYSTEMS AND SIGNAL PROCESSING",
  year="2023",
  volume="42",
  number="9",
  pages="5267--5288",
  doi="10.1007/s00034-023-02337-y",
  issn="0278-081X",
  url="https://link.springer.com/article/10.1007/s00034-023-02337-y"
}