中国科学院大学学报2026，Vol.43Issue(2)：218-229,12.DOI:10.7523/j.ucas.2024.053
低轨卫星通信系统的时频联合同步算法
Joint timing and frequency synchronization algorithm of LEO satellite communication system
摘要
Abstract
The integration of low earth orbit(LEO)satellite with 5G in the mobile communication system presents extensive application prospects.To ensure effective establishment of communication links between users and base stations,as well as reliable data transmission,time-frequency synchronization technology plays a crucial role.However,traditional timing and frequency synchronization algorithms face limitations when dealing with millimeter wave frequency bands,large bandwidths,high Doppler frequency shifts and change rates,and low signal-to-noise ratios in low-orbit satellite channels.These limitations result in decreased estimation accuracy.For the uplink service data channel of a 5G-based low orbit satellite communication system,a joint timing and frequency synchronization algorithm based on weighted embedded synchronization sequences is proposed to improve the accuracy of timing and frequency offset estimation.Simulation results demonstrate that the proposed timing and frequency synchronization algorithm outperforms traditional algorithms with comparable complexity in terms of synchronization performance.关键词
低轨卫星通信/OFDM/时间同步/频率同步Key words
LEO satellite communication/OFDM/time synchronization/frequency synchronization分类
信息技术与安全科学引用本文复制引用
李燕萍,尚琳,李国通..低轨卫星通信系统的时频联合同步算法[J].中国科学院大学学报,2026,43(2):218-229,12.基金项目
国家自然科学基金(U21A20443)资助 （U21A20443）
