| 摘要: |
| 针对长序列互相关定时同步性能受频偏影响的问题，提出了一种分段频偏补偿的定时同步算法。该算法在分段互相关的基础上，使用频偏补偿替代传统的绝对值操作，在减少载波频偏对同步峰值影响的同时不增加噪声均值。理论分析和仿真结果表明，改进方法定时同步性能优于传统分段方法，适用于低信噪比大频偏的无线通信系统。 |
| 关键词: 无线通信；定时同步；互相关；载波频偏 分段频偏补偿 |
| DOI： |
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| 基金项目:国家重点研发计划（2019YFF0216603，2019YFB1802703） |
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| An anti-frequency offset time synchronization method and its performance analysis |
| FU Bowei,LI Mingqi |
| (1.Shanghai Advanced Research Institute,Chinese Academy of Science,Shanghai 201210,China;2.School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;3.University of Chinese Academy of Science,Beijing 100049,China) |
| Abstract: |
| To solve the problem that the timing synchronization performance of long sequence cross-correlation is affected by frequency offset,a timing synchronization algorithm of segment cross-correlation with frequency offset compensation is proposed.Based on segment cross-correlation,the algorithm uses frequency offset compensation instead of the traditional absolute value operation,which can reduce the effect of carrier frequency offset on the synchronous peak without increasing the mean noise a lot.Theoretical analysis and simulation results show that the improved method has better timing synchronization performance than the traditional segmentation method and is suitable for wireless communication systems with low signal-to-noise ratio and large frequency offset. |
| Key words: wireless communication timing synchronization cross-correlation carrier frequency offset segment frequency offset compensation |
