基于格雷对辅助的UFMC系统定时同步算法  

Golay Pair Aided Timing Synchronization Algorithm for UFMC Systems

作　　者：王梦实 颜彪[1] 周琦 王献炜 沈麟 WANG Mengshi;YAN Biao;ZHOU Qi;WANG Xianwei;SHEN Lin(School of Information Engineering,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《无线电通信技术》2021年第1期110-114,共5页Radio Communications Technology

基　　金：国家自然科学基金项目(61601403)。

摘　　要：与正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)技术相比,通用滤波多载波(Universal Filtered Multi-Carrier,UFMC)技术在结合其优点的同时避免了一些缺陷,UFMC不需要循环前缀,并且具有良好的带外抑制和极高的频谱利用率,因此其更适合作为5G通信系统的物理层波形技术。由于UFMC系统传统的定时同步算法会产生不同程度的平台效应导致其定时精确度低,因此提出了一种基于格雷对辅助的符号定时同步算法。该算法利用格雷对非周期自相关互补特性,用放大的信号能量与自相关互补区域内的平均信号能量相比来获得尖峰。相比传统算法,所提算法在较低复杂度下不仅消除了平台效应,还使准确率和均方误差性能得到提升。Compared with orthogonal frequency division multiplexing(OFDM)technology,universal filtered multi-carrier(UFMC)technology combines its advantages while avoiding some defects.UFMC does not require cyclic prefix,and has good out-ofband suppression and extremely high frequency efficiency,so it is more suitable as a physical layer waveform technology for 5G communication systems.Traditional timing synchronization algorithm of the UFMC system will produce different degrees of platform effect and its timing accuracy is low.This paper proposes a new algorithm based on Golay pair aided symbol timing synchronization algorithm,which uses Golay pair’s aperiodic auto-correlation complementary characteristics.The amplified signal energy is compared with the average signal energy in the auto-correlation complementary region to obtain a peak.Compared with traditional algorithms,the proposed algorithm not only eliminates the platform effect at a lower complexity,but also improves the accuracy and mean square error performance.

关 键 词：通用滤波多载波 符号定时同步 格雷对 定时函数 

分 类 号：TN929.5[电子电信—通信与信息系统]