Enhanced ADO-OFDM-based adaptive digital dimming VLC system.

Area of Science:

• Optical Communications
• Wireless Technology
• Signal Processing

Background:

• Visible Light Communication (VLC) systems offer simultaneous illumination and data transmission.
• Dimming control is crucial in VLC for managing lighting and energy consumption.
• Existing methods like enhanced asymmetrically clipped DC biased optical OFDM (EADO-OFDM) and negative EADO-OFDM (ENADO-OFDM) have performance limitations.

Purpose of the Study:

• To propose a novel adaptive digital dimming optical-orthogonal frequency division multiplexing (ADDO-OFDM) technique.
• To combine the advantages of EADO-OFDM and ENADO-OFDM for improved VLC performance.
• To achieve effective dimming control over a broad range with acceptable bit error rates.

Main Methods:

• The proposed ADDO-OFDM utilizes pulse width modulation (PWM) for dimming control.
• It integrates the benefits of both EADO-OFDM and ENADO-OFDM.
• The system is designed to maintain a favorable data length for efficient communication.

Main Results:

• The ADDO-OFDM system demonstrates effective control over a vast dimming range.
• An acceptable bit error rate (BER) is achieved across the tested dimming levels.
• The proposed method leverages the performance strengths of its constituent techniques.

Conclusions:

• The novel ADDO-OFDM technique provides a robust solution for dimming control in VLC systems.
• It offers enhanced performance by combining EADO-OFDM and ENADO-OFDM.
• This approach supports efficient and reliable visible light communication with flexible lighting control.