The Improved Precoding Method in the VLC-Based Intelligent Transportation System

• Published in: Journal of advanced transportation Vol. 2022; pp. 1 - 9
• Main Authors: li, Shilin, Cheng, Y., Zhou, T.Y., Liang, P.Y.
• Format: Journal Article
• Language: English
• Published: London Hindawi 30-06-2022; John Wiley & Sons, Inc; Hindawi Limited; Hindawi-Wiley
• Subjects: Bandwidths; Codes; Communications systems; Fourier transforms; Intelligent transportation systems; Methods; Optical communication; Performance enhancement; Selective fading; Signal processing; Signal to noise ratio; Spectrum allocation; Subcarriers; Transportation; Transportation industry; Wave division multiplexing; China; Japan
• ISSN: 0197-6729; 2042-3195
• DOI: 10.1155/2022/5951389

Visible light communication (VLC) transmission system, combined with lighting and communication, has a great application value in the field of intelligent transportation. To efficiently improve the performance of VLC-based intelligent transportation system, an improved precoding scheme is proposed and experimentally verified. Partial data-carrying subcarrier (PDS)-precoding scheme can balance the signal-to-noise ratio (SNR) and combat frequency selective fading (FSF) in the VLC-based intelligent transportation system. For ∼3.52 Gb/s DMT-VLC system with 1.9-m free space transmission, the OCT-based PDS-precoding signal shows almost the same BER performance as full data-carrying subcarriers precoding ones. Compared with the conventional scheme, the BER is reduced from 2e-3 to 8.14e-5 by using the proposed PDS-precoding. PDS-precoding is a nice choice to degrade the unbalanced damage for data-carrying subcarriers (SCs) in the bandwidth-limited VLC-based intelligent transportation system.