研究目的
To demonstrate, for the first time, m-CAP modulation using off-the-shelf LEDs in a VLC system in a real-time experimental setup, achieving transmission speeds sufficient for high-definition television streaming.
研究成果
The demonstration successfully achieves real-time m-CAP modulation in a VLC system with off-the-shelf LEDs, supporting transmission speeds up to ～30 Mb/s, sufficient for HDTV streaming. The system shows flexibility in modulation formats and potential for real-world applications despite minor intermodulation from ambient light.
研究不足
The experiment is conducted in a controlled environment with a fixed 0.5 m link distance, and the impact of ambient light sources like fluorescent bulbs introduces minor intermodulation effects.
1：Experimental Design and Method Selection:
The experiment utilizes m-CAP modulation in a VLC system with off-the-shelf LEDs, employing field programmable gate arrays (FPGAs) for real-time signal processing.
2：Sample Selection and Data Sources:
The system uses white LEDs and a silicon p-i-n photodiode for transmission and reception, respectively.
3：List of Experimental Equipment and Materials:
Includes USRP-RIO for signal processing, Texas Instruments THS3202 amplifier, Osram Golden Dragon LED, and Thorlabs PDA100A2 packaged receiver.
4：Experimental Procedures and Operational Workflow:
The signal is modulated into m-CAP format, amplified, and transmitted over a
5：5 m link, then received, demodulated, and BER measured. Data Analysis Methods:
BER performance is measured for different modulation formats and subcarrier numbers.
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