基于载波动态调整的FDMA系统优化关键技术研究

Research on key technology of FDMA system optimization based on carrier dynamic adjustment

摘要:

目前，基于频分复用（Frequency Division Multiple Access，FDMA）体制的卫星通信系统在数据传输过程中带宽资源调整受限，灵活性较差。在当前FDMA通信系统的框架之下设计出新的调制解调模块架构；对载波变化的工作流程进行了规划；根据需要设计出适合新系统的数据帧结构并验证了其可靠性；采用了通信测距技术，对全网时间同步进行了分析计算，并验证了测距的稳定性；经实际工程环境搭建验证，初步实现了载波动态调整。

Abstract:

At present,the satellite communication system based on Frequency Division Multiple Access has disadvantages of limited bandwidth adjustment and poor flexibility in data transmission.A new modem module architecture is designed under the framework of current FDMA communication system.The workflow of carrier adjustment is planned.According to the needs,the data ton structure suitable for the new system is designed and its reliability is verified.Communication ranging technology is adopted to analyze and calculate the time synchronization of the whole network,and the stabilityof ranging is verified.The carrier dynamic adjustment is preliminarily realized through the construction verification of the actual engineering environment.