研究目的
To design and test an Analog Front-End (AFE) receiver circuit for Visible Light Communication (VLC) systems that is robust against optical noise interference and DC ambient light in indoor environments.
研究成果
The designed AFE receiver circuit successfully mitigates unwanted signals caused by optical noise and DC ambient light, demonstrating robustness in indoor VLC systems. The circuit's performance was validated through simulation and real-world testing, showing its potential for practical applications.
研究不足
The research primarily focuses on the design and testing of the AFE receiver circuit in a controlled laboratory environment. The real-world application may require further optimization to handle varying conditions and interference sources not covered in the study.
1：Experimental Design and Method Selection:
The research involved designing an AFE receiver circuit with several analog blocks including Trans-impedance Amplifier (TIA), Non-inverting amplifier, DC gain buffer & Differential amplifier, high-pass filter (HPF), notch filter, Automatic Gain Controller IC, and amplitude signal adjuster. The circuit was tested in both simulation and real-world conditions.
2：Sample Selection and Data Sources:
The SP-8ML Kodenshi PIN photodiode was used for detecting visible light and infrared. The circuit was tested with interference from artificial light bulbs and DC light sources.
3：List of Experimental Equipment and Materials:
AD8011AN Op-Amp from Analog Devices Inc., SP-8ML Kodenshi PIN photodiode, LM13700 IC for AGC, and STM32F4 microcontroller for ADC.
4：Experimental Procedures and Operational Workflow:
The circuit was simulated using SPICE? PROTEUS software and then tested in a laboratory setting to evaluate its performance in filtering out optical noise and DC ambient light.
5：Data Analysis Methods:
The circuit's performance was evaluated using bit-error rate (BER) analysis and signal-to-noise ratio (SNR) measurement, and a VLC demo was conducted to test robustness against indoor interference noise.
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