On the study of the relation between linear/nonlinear PAPR reduction and transmission performance for OFDM-based VLC...

Area of Science:

• Optical Communications
• Signal Processing
• Wireless Networks

Background:

• Visible Light Communication (VLC) systems utilize Orthogonal Frequency Division Multiplexing (OFDM) for high-speed data transmission.
• Peak-to-Average-Power-Ratio (PAPR) is a critical parameter affecting the performance of OFDM-based VLC systems.
• Effective PAPR reduction schemes are essential for improving transmission efficiency and reliability in VLC.

Purpose of the Study:

• To experimentally investigate the relationship between PAPR reduction schemes and transmission performance in OFDM-based VLC systems.
• To optimize linear Selective Mapping (SLM) and nonlinear logarithmic companding schemes for both PAPR reduction and Bit Error Rate (BER) performance.
• To compare the effectiveness of SLM and logarithmic companding in mitigating PAPR and improving BER in VLC.

Main Methods:

• Experimental investigation of PAPR reduction schemes in an OFDM-based VLC system.
• Optimization of linear SLM and nonlinear logarithmic companding schemes.
• Numerical and experimental analysis of BER performance under different PAPR reduction techniques.
• Evaluation of system complexity and efficiency trade-offs.

Main Results:

• The logarithmic companding scheme achieves greater PAPR reduction than the SLM scheme.
• The logarithmic companding scheme can lead to worse BER performance due to induced noise.
• The linear SLM scheme demonstrates superior BER performance compared to logarithmic companding, despite increased complexity and reduced efficiency.
• For a 400-Mb/s transmission over 1 m, SLM reduced BER to 1.77 × 10^-6, significantly outperforming logarithmic companding (2.51 × 10^-4).

Conclusions:

• The choice of PAPR reduction scheme significantly impacts the BER performance of OFDM-based VLC systems.
• Linear SLM offers a better trade-off between PAPR reduction and BER performance for VLC compared to logarithmic companding.
• Optimized SLM is a promising technique for enhancing the reliability of high-speed visible light communication.