基于正交频分复用的低轨卫星移动通信同步控制系统设计

Design of synchronous control system for low orbit satellite mobile communication based on orthogonal frequency division multiplexing

摘要:

低轨卫星移动通信信息存在复用保护间隔，为实现对传输数据信息的精准定位，设计基于正交频分复用的低轨卫星移动通信同步控制系统。设置电源管理模块，初步协调BDG-MF-OS型卫星终端与ZIGBEE无线数据传输模块，将卫星通信信息反馈至网络与显示模块，实现低轨卫星移动通信同步控制系统的硬件设计。建立同步信号模型，通过信号调制解调的方式，完善待处理通信信息的复用保护间隔与循环前缀，实现正交频分复用处理的关键技术研究。分包处理通信数据，借助已知的短报文通信模式，连接同步通信协议，完成低轨卫星移动通信同步控制。与北斗型通信控制系统相比，正交频分复用技术作用下，低轨卫星的移动通信能力得到强化，较好满足精准定位传输数据信息的实际应用需求。

Abstract:

In order to realize the accurate positioning of the transmitted data information, a synchronization control system of LEO satellite mobile communication based on orthogonal frequency division multiplexing is designed. Set up the power management module, initially coordinate the bdg-mf-os satellite terminal and ZigBee wireless data transmission module, feedback the satellite communication information to the network and display module, and realize the hardware design of LEO satellite mobile communication synchronization control system. Establish the synchronous signal model, improve the multiplexing protection interval and cyclic prefix of the communication information to be processed through signal modulation and demodulation, and realize the key technology research of orthogonal frequency division multiplexing processing. With the help of the known short message communication mode, the synchronous communication protocol is connected to complete the synchronization control of LEO satellite mobile communication. Compared with the Beidou communication control system, the mobile communication capability of LEO satellite is strengthened under the effect of orthogonal frequency division multiplexing technology, which can better meet the practical application requirements of accurate positioning and transmission of data information.