卫星星内漫反射无线光通信系统设计

Design of Intra-Spacecraft Diffuse Wireless Optical Communication System

卫星星内漫反射无线光通信系统利用漫反射光作为传输介质替代传统的有线电缆,对卫星的减重、降能耗发挥了巨大作用,并可简化卫星在组装、集成和测试(AIT)阶段的工作。分析和仿真了卫星星内空间漫反射光传输链路。通过使用红外LED发射光信号,PIN光电二极管接收光信号来完成光电信号之间的转换,并结合CAN总线通信系统,设计了一套卫星星内无线光通信系统。系统在星内空间模拟平台上进行测试,实现了可视链路上1M波特率和非可视漫反射链路上500K波特率的稳定通信。

The intra-spacecraft diffuse wireless optical communication system uses diffuse wireless light as the transmission medium instead of the traditional cable,which has made a significant contribution to the reduction of weight and energy consumption of satellites.It also simplifies the work in the assembly,integration and testing phase（AIT）.The diffuse optical transmission link inside the satellite was analyzed and simulated in this paper.The infrared LED was used to emit light,and the PIN photodiode was used to receive light,both of which accomplish the conversion between optical signals and electric signals.Combined with CAN bus communication system,the satellite wireless optical communication system was designed.The system was tested on a simulation platform of the satellite,enabling stable communication at 1 M baud on the visual link and 500 Kbaud on the non-visible diffuse link.