星间激光干涉仪中频载波跟踪技术研究  

Research on Tracking Technology of the Intermediate Frequency Carrier of Inter⁃Satellite Laser Interferometer

作　　者：马磊 钟兴旺[1] 刘玄 踪念科[1] Ma Lei;Zhong Xingwang;Liu Xuan;Zong Nianke(China Academy of Space Technology,Xi′an 710100,China)

机构地区：[1]中国空间技术研究院西安分院,陕西西安710100

出　　处：《西北工业大学学报》2018年第S01期18-22,共5页Journal of Northwestern Polytechnical University

摘　　要：针对星间激光干涉测距系统高动态载波跟踪的需求,提出了一种基于锁频环(FLL)辅助锁相环(PLL)的载波跟踪算法,采用改进后的叉积自动频率跟踪环(CPAFC)进行频率牵引,采用科斯塔斯环对载波相位进行高精度跟踪,有效解决了高动态条件下环路跟踪精度和动态适应性能之间的矛盾。基于simulink搭建了模块化仿真系统,对载波环路的性能进行了仿真,结果表明该跟踪环路能够适应±6 kHz/s的环路动态,可用于星间激光干涉仪高动态载波信号的稳定跟踪。Aiming at the high dynamic carrier tracking requirements of inter⁃satellite laser interferometer,a FLL⁃Assisted⁃PLL carrier tracking loop algorithm is proposed in this paper.An improvement on cross⁃product automatic frequency control(CPAFC)loop is performed.The use of FLL achieves carrier frequency pulling.The use of Costas loop achieves high accuracy tracking of carrier phase.The algorithm effectively resolves the contradiction between carrier tracking accuracy and dynamic performance.A modular simulation system is built based on Simulink.The performance of the carrier loop is simulated.The simulation results show that the loops can adapt the dynamic index of±6KHz/s and stably track the high dynamic carrier of inter⁃satellite laser interferometer.

关 键 词：高动态 激光测距 载波跟踪环 锁频环 锁相环 

分 类 号：TN957[电子电信—信号与信息处理]