An LED-Based Visible Light Communication System with Enhanced Data Rate Capabilities

In this paper, we present an LED-based visible light communication (VLC) system. The system employs LEDs as light sources for data transmission while offering advantages of low power consumption and high efficiency. We provide a detailed explanation of the system's working principles, including modulation techniques typically implemented through PWM (Pulse Width Modulation) or OFDM (Orthogonal Frequency Division Multiplexing) coding schemes, and discuss its promising applications in communication fields.

At the receiver end, we implement an equalizer to enhance data transmission rates. The equalizer functions as a channel distortion correction device, utilizing algorithms such as LMS (Least Mean Squares) or RLS (Recursive Least Squares) adaptive filtering to compensate for signal attenuation and distortion caused by transmission path characteristics and receiver imperfections. Through equalizer implementation involving tap-weight adjustments and convolution operations, we significantly improve data transmission reliability and speed.

Furthermore, we provide spatial distribution maps for bit error rate (BER) and signal-to-noise ratio (SNR). These graphical representations, generated through MATLAB simulations or Python-based computational algorithms, help visualize the VLC system's performance under different environmental conditions. The maps serve as critical references for system design optimization, enabling parameter tuning through regression analysis and pattern recognition techniques. In conclusion, LED-based visible light communication represents a highly promising technology that will bring more convenient and efficient communication solutions to our daily lives.