Work

Improving bit error rate in optical wireless OFDM systems through hybrid companding and precoding strategies

Year: 2025

Type: article

Abstract: Visible light communication (VLC) is a promising wireless high-data-rate transmission technology that uses visible light. Optical Orthogonal Frequency Division Multiplexing (OOFDM)-based systems, especially asymmetrically clipped optical OFDM (ACO-OFDM), face challenges such as high peak-to-average power ratio (PAPR), which causes signal distortion, power inefficiency, and degraded bit error rate (BER) performance. Previous methods like clipping, tone reservation, and standard companding tried to minimize PAPR, but at the expense of increased complexity or BER loss. To mitigate these shortcomings, in this paper, a hybrid scheme is proposed that combines nonlinear companding techniques (NCT) with other precoding schemes—discrete cosine transform (DCT), discrete Hartley transform (DHT), Walsh–Hadamard transform (WHT), and Vandermonde-like matrix (VLM). Simulation results indicate that the presented approach substantially reduces PAPR by up to 6.73 dB while maintaining or even improving BER performance. The proposed approach is an effective solution to high-performance ACO-OFDM-based VLC systems.

Source: EURASIP Journal on Wireless Communications and Networking

DOI: 10.1186/s13638-025-02522-4

Authors: Amal Yasser, Albashir A. Youssef, Mohamed Abaza

Institutions: Modern Academy for Engineering and Technology, Arab Academy for Science, Technology, and Maritime Transport

Language: English

Topic: Optical Wireless Communication Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,790

Funder: Science and Technology Development Fund