空军工程大学学报2025，Vol.26Issue(4)：82-88,7.DOI:10.3969/j.issn.2097-1915.2025.04.010
基于CAZAC序列的互相关同步算法
A Cross Correlation Synchronization Algorithm Based on CAZAC Sequence
李晓辉 1马丹丹 1石明利 1吕思婷1
作者信息
- 1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安,710071
- 折叠
摘要
Abstract
Aimed at the problems that timing synchronization algorithm is sensitive to frequency offset caused by multipath fading and Doppler spread in aviation communication,and is relatively poor in per-formance under condition of low signal-to-noise ratio,a synchronization algorithm is proposed by using constant envelope zero autocorrelation(CAZAC).A leading sequence with conjugate symmetry features is designed by using CAZAC sequences,and based on the structural features of the leading sequence,the cross-correlation is utilized for designing a timing metric function for accumulating peaks.The correlation value at the correct timing position is used to estimate the decimal frequency offset,and lastly,a pair of i-dentical CAZAC sequences is used to complete the second decimal frequency offset estimation.The simula-tion results show that when the correct detection probability reaches 100％,the performance of the im-proved algorithm improves by 3 dB.关键词
航空通信/CAZAC序列/定时同步/频偏估计Key words
aviation communication/CAZAC sequence/timing synchronization/frequency deviation estima-tion分类
信息技术与安全科学引用本文复制引用
李晓辉,马丹丹,石明利,吕思婷..基于CAZAC序列的互相关同步算法[J].空军工程大学学报,2025,26(4):82-88,7.
