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Wireless Personal Communications

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24.04.2024 | Research

Conjugate Gradient Derived Kernel Affine Projection Method for Post-distortion in Visible Light Communication Systems

verfasst von: Yujie Shen, Jieling Wang, Zihan Kang, Ba-Zhong Shen

Erschienen in: Wireless Personal Communications | Ausgabe 1/2024

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Abstract

With the explosive growth in the demand of spectrum, conventional radio frequency systems are increasingly facing the challenge of catering to high-speed transmissions. Visible light communication (VLC) has been considered as a promising supplement technique, since it can provide efficient energy efficiency and unlimited bandwidth. However, the nonlinearity effect is one of the fundamental problems in the VLC systems, which usually brings distortion to the transmitted signal and deteriorates the system performance. Aiming at this problem, numerous post-distortion schemes are proposed, where the kernel methods over reproducing kernel Hilbert spaces are identified to have successful applications. In this paper, we present a new post-distortion method with low computational cost, by utilizing the conjugate gradient (CG) based kernel affine projection algorithm (KAPA), where the objective parameters are updated adaptively along the conjugate direction. Simulation results show that the proposed CG-KAPA based post-distorter can efficiently mitigate nonlinear impairment in VLC systems, which can provide better bit error rate performance with fast convergence over the commonly-used gradient descent algorithms.

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Titel: Conjugate Gradient Derived Kernel Affine Projection Method for Post-distortion in Visible Light Communication Systems
verfasst von: Yujie Shen
Jieling Wang
Zihan Kang
Ba-Zhong Shen
Publikationsdatum: 24.04.2024
Verlag: Springer US
Erschienen in: Wireless Personal Communications / Ausgabe 1/2024
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI: https://doi.org/10.1007/s11277-024-11084-5

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