A Fine Synchronization Method for Coherent Fast Frequency Hopping

作     者：Xuanhe Yang Weike Zhang Shixun Luo Chang Li Xiaqing Miao Aihua Wang Xuanhe Yang;Weike Zhang;Shixun Luo;Chang Li;Xiaqing Miao;Aihua Wang

作者机构：School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China 96901 People’s Liberation Army(PLA)TroopsBeijing 100000China School of Cyberspace Science and TechnologyBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《中国通信:英文版》 (China Communications)

年 卷 期：2023年第20卷第10期

页      面：163-184页

核心收录：

学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：funded by National Scientific Foundation of China under grants(No.62101050 and No.62001022) 

主　　题：fast frequency hopping(FFH) spread spectrum communication fine synchronization 

摘      要：Coherent fast frequency hopping(CFFH)is attracting growing attention owing to its good antijamming performance and the coherent combining ***,compared with the conventional non-coherent fast frequency hopping,CFFH requires a more precise system *** this paper,we propose a new fine synchronization algorithm for *** algorithm consists two stages,namely,open-loop stage and closed-loop *** the openloop stage,a grid-based search parameter estimation method is *** the closed-loop stage,we construct a fully coherent phase-locked loop(PLL)and a delay-locked loop(DLL)with decoding feedback structure to perform further fine estimation of the system clock skew and time delay,***,we analyze the effect of the search parameter settings on the estimation error and derive the root mean squared error(RMSE)of estimates in the steady state of the closed-loop ***,through simulation,the RMSE performance are compared with the corresponding Cramer-Rao low bound(CRLB)and conventional code loop estimation to show the effectiveness of proposed algorithm.