高速数传基带接收低轨卫星数据闪锁异常分析  

Flash-lock analysis of HDR reception data from LEO remote satellite

作　　者：陈爱平[1] 孙海忠 罗强 CHEN Aiping;SUN Haizhong;LUO Qiang(Beijing Institute of Telemetry and Telecommunications Technology, Beijing 100094, China;China Satellite Launch and Tracking Control General, Beijing 100011, China;South-west China Institute of Electronic Technology, Chengdu 610036, China)

机构地区：[1]北京跟踪与通信技术研究所,北京10094 [2]中国卫星发射测控系统部,北京100011 [3]中国西南电子技术研究所,成都610036

出　　处：《遥测遥控》2019年第3期68-72,共5页Journal of Telemetry,Tracking and Command

摘　　要：针对某卫星工程应用中出现的卫星过顶时高速数传基带闪锁问题,基于低轨卫星的高动态二阶多普勒特性,分析得出了数传基带载波跟踪环路带宽过窄是造成帧同步闪锁的原因,通过增加环路带宽的方法实现三阶跟踪环路稳定接收高动态低轨卫星数据的能力,通过模拟测试得出了结论,在不高于600Mbps速率QPSK、OQPSK调制方式下载波跟踪环路均可稳定跟踪。Aiming at the flash-lock phenomenon of the HDR when the satellite passes the zenith of the ground station, and based on the characteristics of the level-2 Doppler frequency of the LEO satellite with high dynamic, the conclusion is drawn which the bandwidth of the carrier tracking PLL is too narrow to track the level-2 Doppler rate of the high dynamic target. After adding the bandwidth of the carrier PLL, it is achieved the HDR receiving the high bit rate data with high dynamic from LEO satellite. The test result indicates that the HDR works normally and stably with QPSK and OQPSK scheme below the 600 Mbps data rate.

关 键 词：高速数传基带 载波跟踪环 帧同步闪锁 

分 类 号：TN91[电子电信—通信与信息系统]