SLM-based ACO-OFDM VLC system with low-complexity minimum amplitude difference decoder

• Published in: Electronics letters 2018-02, Vol.54 (3), p.144-146
• Main Author: Hu, Wei-Wen
• Format: Article
• Language: English
• Subjects: asymmetrically clipped optical orthogonal frequency division multiplexing; bit error rate performance; CSLM scheme; error statistics; free‐space optical communication; Information and communications; low‐complexity MAD decoder; low‐complexity minimum amplitude difference decoder; maximum likelihood decoder; maximum likelihood decoding; OFDM modulation; PAPR; peak‐to‐average power ratio; selected mapping; side information; SLM‐based ACO‐OFDM VLC system; symmetric vectors; visible light communication system
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.3158

A novel low-complexity minimum amplitude difference (MAD) decoder is proposed for selected mapping (SLM)-based asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) visible light communication (VLC) system. With the proposed scheme, a specific set of symmetric vectors is designed to minimise the peak-to-average power ratio (PAPR) of signal without the transmission of side information (SI) and recover SI blindly by the proposed MAD decoder. Simulation results show that the proposed scheme reduces the PAPR effectively and the bit error rate performance of ACO-OFDM system with MAD decoder is very close to that of conventional selected mapping (CSLM) scheme with maximum likelihood decoder, but at much lower complexity.