基于嵌入式的空间光通信系统前馈补偿系统设计

为满足光通信系统对于目标数据的快速捕获需求,缩小各级通信设备间的动态跟踪误差,设计基于嵌入式技术的空间光通信系统的前馈补偿系统;以并串转换电路作为唯一的电能输出装置,在光通信信号发射模块、波分复用器件、嵌入式光放大器三个通信设备元件的共同调节作用下,确定PWM功率放大器的实时执行能力,达到对前馈型角编码器的调度与应用,实现空间光通信系统前馈补偿结构的搭建;配置Linux嵌入内核的移植协议,多次创建空间光环境下的通信数据根文件,以此为存储标准,计算补偿调制的基础传信率,实现对前馈脉冲波的调制与处理,完成嵌入式通信系统的前馈补偿原理研究;实验结果表明,应用前馈补偿系统后,在光通信参量等于5.0×1011 T、7.0×1011 T、9.0×1011 T的情况下,目标数据的捕获速率均超过7.0 T/mm,满足缩小通信设备间动态跟踪误差的实际应用需求。

Design of feedforward compensation system based on embedded space optical communication system

In order to meet the needs of the optical communication system for the rapid capture of target data and reduce the dynamic tracking error between all levels of communication equipment, a feedforward compensation system for the spatial optical communication system based on embedded technology is designed. With the parallel-to-serial conversion circuit as the only power output device, under the joint adjustment of the three communication equipment components of the optical communication signal transmission module, the wavelength division multiplexing device, and the embedded optical amplifier, the real-time execution capability of the PWM power amplifier is determined to achieve For the scheduling and application of feedforward angle encoders, the construction of feedforward compensation structure for space optical communication systems is realized. Configure the Linux embedded kernel transplantation protocol, create multiple communication data root files under the space light environment, use this as the storage standard, calculate the basic transmission rate of the compensation modulation, realize the modulation and processing of the feedforward pulse wave, and complete the embedding Research on the principle of feedforward compensation in communication systems. The experimental results show that after the feedforward compensation system is applied, when the optical communication parameters are equal to 5.0×1011T, 7.0×1011T, and 9.0×1011T, the target data capture rate exceeds 7.0T/mm, which satisfies the reduction of dynamic tracking between communication devices The actual application requirements of the error.