摘要
吉林一号卫星测控采用USB测控体制,遥控接收采用FFT+DPLL1+DPLL2的架构,FFT主要实现对载波的粗捕,DPLL1在FFT的基础上实现对载波相位的精跟踪,DPLL2实现副载波的跟踪。对遥控副载波跟踪所用到的数字PLL技术进行了研究,首先给出了载波多普勒折算到副载波上的方法,然后对模拟PLL数字化进行了详细的论述,并设计了遥控副载波同步用的PLL2,对其稳定性、快捕带及快捕时间、捕获带和捕获时间、同步速率等进行了分析和仿真。结果表明,该方法具有捕获时间短、跟踪精度高、稳定性好等特点,易于数字化实现,已成功在吉林一号系列卫星中得到应用。
Jilin-1 satellites TT&C adopts USB system. The receiver adopts the architecture FFT +DPLL1 +DPLL2. FFT mainly real-izes coarse capture of carrier. DPLL1 realizes tracking of carrier phase on the basis of FFT. DPLL2 realizes subcarrier tracking.This paper studies the digital PLL technology used in the tracking of the subcarrier. Firstly, the calculation method of converting the carrier doppler parameter to the subcarrier is given. Then the analog PLL digitization is discussed in detail. The PLL2 used in the synchronization of the uplink subcarrier is designed. The stability, fast pull range and time, pull range and time are discussed.The results show that the method has the characteristics of short capture time, high tracking accuracy, good stability and is easy to realize in digital. Now it has been successfully applied in Jilin-1 series satellites.
作者
张士伟
邢斯瑞
常俊德
金宇婷
赵博
沈晨阳
Zhang Shiwei;Xing Sirui;Chang Junde;Jin Yuting;Zhao Bo;Shen Chenyang(Chang Guang Satellite Technology Co.,Ltd.,Changchun 130000,China)
出处
《电子技术应用》
2022年第5期61-64,69,共5页
Application of Electronic Technique
基金
吉林省科技发展计划项目(20200401105GX)。
关键词
数字锁相环
快捕带
快捕时间
频率牵引时间
相位误差标准差
digital phase-locked loop(DPLL)
fast pull-in range
fast pull-in time
pull-in range and time
phase error standard deviation
