卫星通信调制解调器双机热备份数据切换器的研制

摘要

基于W77E58微处理器设计了卫星通信调制解调器双机热备份数据切换器。该切换器在不改变调制解调器软硬件配置的情况下实现了调制解调器的热备份。介绍数据切换器的硬件设计，并阐述了软件部分的设计。该设计缩短了卫星通信调制解调器在故障状态下的切换时间，减少了通信中断次数和时间，提高了卫星通信调制解调器的任务可用性和可靠性。%Based on W77E58 micro controller,a data switcher of hot backup for satellite communication MODEM was de⁃signed. Without changing current hardware and software configurations of the MODEM,the function of hot backup of MODEM was fulfilled. The hardware design of data switcher is introduced and the software design is elaborated in this paper. The design shortens the switch time when the MODEM is working in abnormal state,decreases the outage times of communication,and im⁃proves the mission usability and reliability of the satellite communication MODEM.