Blue-Shift Effect Based Positioning for Multi-Color VLC
IEEE Communications Letters, vol.30, pp.184-187, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 30
- Publication Date: 2026
- Doi Number: 10.1109/lcomm.2025.3630041
- Journal Name: IEEE Communications Letters
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Page Numbers: pp.184-187
- Keywords: angle of arrival, multi-color, optical filters, the blue-shift, Visible light communication and positioning
- Karadeniz Technical University Affiliated: Yes
Abstract
In this letter, an angle-of-arrival (AoA)-based integrated positioning system is proposed that utilizes the standard optical front-end of multi-color visible light communication (MC-VLC). Unlike traditional AoA methods, which rely on specialized receiver architectures, the proposed approach uses the inherent angular dependence of optical filter transmission responses, known as the blue-shift effect, for directly estimating the angle of incidence from the received signal. In this context, an AoA estimation technique is developed by combining eigenvalue decomposition of the MC-VLC channel with regression analysis. Simulation results show that the proposed system achieves millimeter-level positioning accuracy, enabling robust and high-precision indoor localization without additional hardware complexity or cost.