基于软件无线电的S频段通用化TDRSS用户终端

介绍了一种S频段通用化跟踪与数据中继卫星系统(Tracking&Data Relay Satellite System,TDRSS)用户终端的实现方案,重点论述了射频通道的通用化设计和数字处理模块的实现。对70 MHz中频信号直接欠采样数字化后,利用FPGA完成中频处理的所有流程,实现了一个硬件平台满足不同通信频点、扩频伪码和信息速率的需求。系统具有体积小、重量轻的特点,适合应用于微小卫星平台。测试结果表明,能满足常规中继测控通信指标要求。

Research on S-band General TDRSS User Terminal Transponder Based on Software Radio Technique

The implementation of an S-band general TDRSS user terminal transponder scheme is introduced; then the generalization design of the RF channel and the implementation of the digital signal processing module are discussed particularly.After the 70 MHz IF signal is under sampled,the overall IF processing flow is performed by a single FPGA,so a general hardware platform can satisfy the requirements of different communication frequencies,chip codes and data rates.In micro-satellite platforms where size,weight and performance are of major constraints,this system is desirable.Test results show that this system can meet conventional TDRSS TTC requirements.