研究目的
Proposing a novel modulation method for visible light communication that allows dimming without causing flicker, addressing the issue of brightness change affecting human eye comfort.
研究成果
The proposed Mixed PPM method enables dimming for visible light communication without causing flicker, as confirmed by communication performance tests and human perception evaluations. It shows almost the same BER as conventional methods and no flicker perception in questionnaire results.
研究不足
The study focuses on a specific modulation method and its application in visible light communication, potentially limiting its generalizability to other modulation techniques or communication ranges.
1：Experimental Design and Method Selection:
The study evaluates a novel modulation method combining pulse position modulation (PPM) and inverted pulse position modulation (i-PPM) to achieve dimming in visible light communication without flicker.
2：Sample Selection and Data Sources:
The experiment involves sending 25,000 times 272bit information for each dimming ratio using a 10W power LED.
3：List of Experimental Equipment and Materials:
The transmitter element is the X-Lamp XM-L made by Cree.
4：Experimental Procedures and Operational Workflow:
The study includes two experiments: one to measure the communicable distance and BER, and another to conduct a questionnaire about flicker perception at each dimming light level.
5：Data Analysis Methods:
The performance is evaluated based on communication performance and human perception of flicker.
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