| 摘要: |
| 针对海上卫星通信终端在性能调试、系统联试和试验现场环节中关键特性的快速检测需求，设计和开发了一套便携式测试系统。测试系统可模拟生成码片速率为3.069 Mchip/s的星地前向扩频信号，接收解调数据速率最大为2.0 Mb/s的返向正交相移键控（Quadrature Phase Shift Keying，QPSK）调制信号，且具备快速检测终端捕获和跟踪卫星信号时间是否优于7.0 s的能力。采用软件无线电思想，基于Matlab的卫星信号模拟程序替代现场可编程门阵列(Field Programmable Gate Array，FPGA)完成数据的组帧、加扰和扩频处理，降低了测试系统开发难度和周期，并提高了适应性和灵活性。各阶段的应用结果表明，便携式测试系统能够快速测试卫星通信终端的关键特性，为现场及时发现并定位问题提供了可靠依据。 |
| 关键词: 卫星通信终端 测试系统 快速测试 软件无线电 |
| DOI： |
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| 基金项目:中国科学院科战略性先导科技专项（A类）资助（XDA22000000） |
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| A rapid test system for maritime satellite communication terminals |
| RAO Hao,LIANG Xianfeng,ZHANG Jinzhou,TIAN Ye,CHEN Dejun,AN Junshe |
| (1.National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;2.University of Chinese Academy of Sciences,Beijing 100190,China;;3.Huawei Technologies Co.,Ltd.,Beijing 100085,China) |
| Abstract: |
| A portable test system is designed and developed for the rapid detection of key characteristics of marine satellite communication terminals in performance debugging,system joint test and trial field.The test system not only can simulate satellite-ground forward link spread spectrum signals with chip rate 3.069 Mchip/s,and receive backward link filtered quadrature phase shift keying(QPSK）modulation signals with data rate 2.0 Mb/s,but also has the ability to quickly determine whether the acquisition and tracking time of the satellite signal by the terminal is better than 7.0 s.With software defined radio technology,the satellite signal simulation program based on Matlab replaces the field programmable gate array(FPGA) program to complete data framing,scrambling and spread spectrum processing,which reduces the development difficulty and cycle of this test system,and improves the adaptability and flexibility.The application results of each stage show that this portable test system can quickly test the key characteristics of satellite communication terminals,which provides a reliable basis for on-site timely detection and positioning problems. |
| Key words: satellite communication terminal test system rapid test software defined radio |
《电讯技术》编辑部 