计算机工程与应用2017，Vol.53Issue(14)：76-79,98,5.DOI:10.3778/j.issn.1002-8331.1602-0095
改进CAZAC序列的OFDM时频同步算法
OFDM timing and frequency synchronization algorithm based on weighted CAZAC sequence
摘要
Abstract
In this paper, a novel preamble structure based on weighted CAZAC(Constant Amplitude Zero Auto Correlation) sequence is designed to solve timing ambiguity and high interference peak. The conjugate symmetry of training sequence is used for symbol timing and frequency offset estimation. Then with the redundancy of the cyclic prefix, the fine fractional frequency offset is completed. Finally, the cyclic shifting operation in time domain is adopted to estimate the integer fre-quency offset. Analysis and computer simulation results show that the proposed method achieves high timing and frequen-cy offset estimation accuracy compared with other algorithm, and solves the problem of synchronization inaccuracy under multipath fading channel. The proposed method has important significance for improving the performance of OFDM sys-tem under multipath fading channel environment.关键词
正交频分复用/同步/恒包络零自相关序列/多径衰落信道Key words
Orthogonal Frequency Division Multiplexing(OFDM)/synchronization/Constant Amplitude Zero Auto Cor-relation(CAZAC)sequence/multipath fading channels分类
信息技术与安全科学引用本文复制引用
刘彬,罗志年,彭疆..改进CAZAC序列的OFDM时频同步算法[J].计算机工程与应用,2017,53(14):76-79,98,5.基金项目
国家自然科学基金(No.61371115) （No.61371115）
湖南省教育厅资助重点科研项目(No.11A065). （No.11A065）
