Improved Detection And Adaptive Noise Suppressive Strategy For SEE-OFDM VLC Links

Abstract

This paper examines the optimization of Spectral and Energy Efficient Orthogonal Frequency Division Multiplexing (SEE-OFDM) for Visible Light Communication (VLC) systems. It focuses on reducing the harmful effects of high Peak-to-Average Power Ratio (PAPR). SEE-OFDM improves power efficiency by only transmitting positive signal components, but it is still very vulnerable to LED nonlinearity. This nonlinearity causes clipping noise and lowers transmission quality. By using effective signal processing methods, such as transform-based precoding, nonlinear companding, and time-domain noise cancellation, the study shows a significant reduction in PAPR and an improvement in Bit Error Rate (BER) performance. The results provide a strong framework for achieving fast, reliable optical data transmission while protecting hardware from nonlinear distortion. This ultimately makes SEE-OFDM more practical for real-world VLC applications.