对基于变电站通信网络和自动化系统的国际标准——IEC61850的变电站过程层进行了研究。
The process level of substation, which is based on the international standard IEC61850 of substation communication network and automatic system, is researched.
论文通过对卫星通信方式的研究，选定国际海事卫星作为系统的卫星接入方式。
After the satellites communication modes being studied, the International Maritime satellite system is selected as the audio-video data transmission system.
CD MA数字蜂窝移动通信系统由于其具有良好的通信性能，已成为近年来国际上研究的热点之一。
CDMA digital cellular mobile system has remarkable communication performance. It has been one of the hottest research topics in recent years.
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