CSK-Based Flip-OTFS for Visible Light Communications over Multipath Optical Channels
Year: 2026
Type: conference-paper
Abstract: This paper investigates a Color Shift Keying (CSK)-based Flip-Orthogonal Time Frequency Space (Flip-OTFS) waveform for visible light communications (VLC) systems. In the proposed structure, Red-Green-Blue (RGB) intensity components generated by CSK modulation are mapped onto the Flip-OTFS frame to obtain an intensity modulation/direct detection (IM/DD)-compatible non-negative optical signal. The bit error rate (BER) and peak-to-average power ratio (PAPR) performances are evaluated under additive white Gaussian noise (AWGN) and static multipath optical channels and compared with Flip-Orthogonal Frequency Division Multiplexing (Flip-OFDM) using 8CSK and 8QAM. Simulation results show that Flip-OTFS provides comparable BER performance in AWGN channels, while offering clear gains in multipath channels. In addition, Flip-OTFS-8CSK achieves a significant PAPR improvement over Flip-OFDM-8CSK. These results indicate that CSK-based Flip-OTFS is a promising waveform candidate for efficient VLC systems.
Authors: Talat Kepezkaya, Ahmet Yazar
Institution: Türk Telekom (Turkey)
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7224824006