高速数传Gardner开环算法设计与分析  

Design and Analysis of High-speed Data Transmission Gardner Open-loop Algorithm

作　　者：李超[1] 田之俊[1] 刘鹏飞 李春平 曹斐 胡祖安 杨傲熙 LI Chao;TIAN Zhijun;LIU Pengfei;LI Chunping;CAO Fei;HU Zu'an;YANG Aoxi(The 54th Research Institute of CETC,Shijiazhuang 050081,China;State Key Laboratory of Astronautic Dynamics,Xi'an 710043,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]宇航动力学国家重点实验室,陕西西安710043

出　　处：《无线电工程》2025年第1期76-87,共12页Radio Engineering

基　　金：国防基础科研计划项目(JCKY2020210B025)。

摘　　要：针对特定飞行器高速数传应用场景下的定时同步问题,分析了传统星地高速数传解调器符号定时同步设计的局限性,通过分析经典的O&M前馈符号定时同步算法,结合当前特定高速数传应用场景的特点,确定了符号定时同步算法设计的依据及设计要点,推导并设计了一种高速数传Gardner开环符号定时同步算法,根据仿真结果从不同角度对算法进行了进一步优化设计,以满足实际应用需求。在传统星地高速数传解调器符号定时同步实现原理基础上,给出了应用高速数传Gardner开环算法的符号定时同步实现原理。In response to the timing synchronization problem in specific high-speed data transmission application scenarios of flight vehicles,the limitations of traditional symbol timing synchronization design of satellite-ground high-speed data transmission demodulator are analyzed.By analyzing the classic O&M feedforward symbol timing synchronization algorithm and combining it with the characteristics of current special high-speed data transmission application scenarios,the basis and key design points for the open-loop symbol timing synchronization algorithm design are determined.Furthermore,a high-speed data transmission Gardner open-loop symbol timing synchronization algorithm is derived and designed.Based on simulation results,the algorithm design is further optimized from different perspectives to meet practical application requirements.Finally,based on the implementation principle of symbol timing synchronization in traditional satellite-ground high-speed data transmission demodulators,the implementation principle of symbol timing synchronization using high-speed data transmission Gardner open-loop algorithm is proposed.

关 键 词：Gardner环路 定时误差估计 高速数传 符号定时同步 

分 类 号：TN911[电子电信—通信与信息系统]