Performance evaluation of carrier-less amplitude phase modulation scheme for indoor visible light communication system

• Main Authors: Joyce, Yew Pei Ling, Hasanudin, Afif Hakim, Abdul Mutalip, Zaiton
• Format: Article
• Language: English
• Published: National Institute of Optoelectronics 2023
• Online Access: http://eprints.utem.edu.my/id/eprint/27179/2/011041403202343.PDF; http://eprints.utem.edu.my/id/eprint/27179/; https://oam-rc.inoe.ro/articles/performance-evaluation-of-carrier-less-amplitude-phase-modulation-scheme-for-indoor-visible-light-communication-system/fulltext
• Institution: Universiti Teknikal Malaysia Melaka

In the field of visible light communication (VLC) systems, carrier-less amplitude and phase modulation have lately been explored as an alternative to various modulation techniques, especially optical orthogonal-frequency-division-multiplexing. This study simulates the performance of carrier-less amplitude phase (CAP) modulation compared to basic On-Off Keying in terms of bit-error-rate, constellation diagram and eye diagram. The performance of CAP-2, CAP -4 and CAP-8 was considered in this study due to low computational complexity. Based on various modulation orders of CAP signals, CAP-4 has the lowest EVM (-10.90 dB) and highest MER (11.30 dB) which indicates better performance, supported by good eye diagram representation. Non-square constellation diagram limits the performance of CAP-8 scheme