| 无人船数据链SC-FDE突发信号载波同步方法 |
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| 作者姓名： | 祝桂刚 付林罡 刘建航 闫朝星 |
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| 作者单位： | 中国石油大学（华东）海洋与空间信息学院;北京遥测技术研究所 |
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| 基金项目： | 航天科技集团青年拔尖人才计划;国家重点研发计划(2018YFC1407200,2019YFC1510904)。 |
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| 摘 要： | 设计了一种适用于无人船组网数据链的SC-FDE突发通信时隙的帧结构,通过计算前导序列和独特字(UW)序列的自相关函数,调整差分相关长度,提出一种适用于多模式帧结构的载波同步方法。最后,通过仿真评估了所提出算法在不同条件下的有效频偏估计范围、频偏估计精度等性能,为算法工程实现的主要设计参数提供参考。
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| 关 键 词： | SC-FDE 载波同步 无人船 突发通信 频偏估计 |
Carrier synchronization method for unmanned surface vehicle data link with SC-FDE burst signal |
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| Authors: | ZHU Guigang FU Lingang LIU Jianhang YAN Chaoxing |
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| Institution: | (College of Oceanography and Space Informatics,China University of Petroleum,Qingdao 266580,China;Beijing Research Institute of Telemetry,Beijing 100076,China) |
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| Abstract: | Aiming at the characteristics of the unmanned ship data link SC-FDE burst signal communication time slot change,a carrier synchronization method based on variable frame length and frame structure is studied.The autocorrelation function of the preamble sequence and the unique word(UW)sequence in the frame structure is used to complete the carrier synchronization.By designing the optimal differential correlation length,it provides sufficient frequency offset estimation range and higher estimation accuracy,while reducing the carrier computational complexity of the synchronization method.Finally,the performance of the designed carrier synchronization method is simulated in terms of frequency offset estimation range,frequency offset estimation accuracy and differential correlation length. |
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| Keywords: | SC-FDE Carrier synchronization Unmanned ship Burst communication Frequency offset estimation |
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