基于扰动观察法的光通信接收端优化策略

Receiving Terminal Optimization Strategy for Optical Communication Based on Perturbation Observation Method

在智能网联汽车的可见光通信系统中,针对运动的光信号发射端和接收端信号传输不稳定的问题,文章用基于扰动观察法实现光电二极管的最佳接收状态来解决。光信号通过光电二极管阵列转换成电信号,电信号通过放大电路后进入冗余平均电路将光电二极管阵列产生的多路电信号进行相似度处理,生成一路相似度最高的信号输出,到达单片机后与基准信号进行相似度计算。对新电信号组对应的空间坐标加入扰动量,扰动后的电信号组再与基准信号进行相似度比较,相似度高的那组信号保留下来作为新的基准信号,根据其对应空间坐标由微机电结构调整光电二极管阵列,达到最佳接收状态,成功解决了信号不稳定的问题。

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.