LTE系统中高抗干扰的PSS检测方法研究  

Research on method of PSS detection with robust jamming immunity in LTE system

作　　者：赵润年[1] 杨思远 徐兰天[1] Zhao Runnian;Yang Siyuan;Xu Lantian(The 41st of CETC, Bengbu 233010, China;CAICT, Beijing 100191, China)

机构地区：[1]中国电子科技集团公司第四十一研究所,蚌埠233010 [2]中国信息通信研究院,北京100191

出　　处：《国外电子测量技术》2018年第3期48-51,共4页Foreign Electronic Measurement Technology

基　　金：国家科技重大专项03专项基金(2017ZX03001021)资助项目

摘　　要：在LTE系统中,为了接入到网络中,首先进行小区搜索过程,获得定时同步和载波频率偏移以及小区的ID。PSS检测作为LTE系统小区搜索的第一步,对整个下行同步性能有着至关重要的影响。针对现有利用PSS相关性进行盲检测技术的抗频偏和抗干扰能力的不足,提出了一种基于循环卷积的LTE下行PSS检测方法,通过循环卷积增强本地PSS与接收的PSS信号自相关性以及消弱其互相关性,实现快速、准确的PSS序列检测,提升了LTE下行同步的性能,并已应用到LTE空口监测仪中。In order to access the network in LTE system,cell research must be carried out firstly to gain time synchronization,carrier frequency offset and cell ID.PSS detection is viewed as the first step of cell research in LTE system and plays an important role on the downlink synchronous property.In order to improve the performance of anti frequency-offset and anti jamming of blind detection with PSS correlation,a method of LTE downlink PSS detection based on cyclic convolution is proposed.Through the process of cyclic convolution,the self-correlation of local PSS signals and received PSS signals is enhanced while the mutual-correlation is weakened.Then the PSS detection is implemented rapidly and accurately,improving the performance of LTE downlink synchronous property.The proposed method has been applied in the LTE Uu monitoring instrument.

关 键 词：LTE PSS 小区搜索 循环卷积 抗干扰 

分 类 号：TN929.5[电子电信—通信与信息系统]