关键词: 可见光通信；智能网联汽车；扰动观察法；相似度

Abstract: In the visible light communication system of intelligent networked vehicle, the problem of unstable signal transmission between the transmitting end and the receiving end of moving optical signal is solved by using the perturbation observation method to achieve the optimal receiving state of photodiode. The optical signal is converted into the electrical signal through the photodiode array, and the electrical signal enters the redundant average circuit after passing through the amplifier circuit. The multi-channel electrical signals generated by the photodiode array are processed for similarity to generate the signal output with the highest similarity along the way. After the signal arrives at the SCM, the similarity between the signal and the reference signal will be calculated. Disturbance is added to the spatial coordinates corresponding to the new electrical signal group. After the disturbance, the electrical signal group is compared with the reference signal for similarity, and the signal group with high similarity is retained as the new reference signal. The photodiode array is adjusted by micro-electromechanical structure according to its corresponding spatial coordinates to achieve the best receiving state, and the problem of signal instability is solved successfully.

Key words: Visible light communication; Intelligent connected vehicle; Perturbation observation method; Similarity