基于软件无线电的S频段通用化TDRSS用户终端  

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

作　　者：郜蓓 章英杰[1] 饶启龙[1] 

机构地区：[1]上海卫星工程研究所,上海200240

出　　处：《无线电通信技术》2014年第6期61-63,92,共4页Radio Communications Technology

基　　金：中科院支撑技术项目(615010201)

摘　　要：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。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.

关 键 词：软件无线电 S频段 通用化 TDRSS用户终端 

分 类 号：V19[航空宇航科学与技术—人机与环境工程] TN927.22[电子电信—通信与信息系统]