LTE-A系统中主同步信号重叠分段检测算法  

Overlapping Segmentation Detection Algorithm of Primary Synchronization Signal in LTE-A System

作　　者：李琳潇 程方[1] 李慧敏 LI Linxiao;CHENG Fang;LI Huimin(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院

出　　处：《计算机工程》2019年第7期103-107,共5页Computer Engineering

基　　金：国家科技重大专项(2015ZX03001013);重庆市重点产业共性关键技术创新专项(cstc2017zdcy-zdzx0030)

摘　　要：针对LTE-A系统中频域快速相关算法计算复杂度高、检测性能不稳定的问题,提出一种主同步信号重叠分段检测算法。通过序列循环操作延长半帧数据尾部,以保证序列的完整性。在此基础上,利用重叠分段操作降低相关复杂度,并根据门限值操作结果判断同步序列是否检测成功。仿真结果表明,该算法的计算复杂度相比频域快速相关算法减少 53.85 %,且对于不同的分段数,当信噪比为-7 dB时,正确检测率接近1.0,检测性能稳定。Aiming at the problems such as high computational complexity and instability of detection performance of the fast frequency domain correlation algorithm in LTE-A system,an primary synchronization signal overlapping segmentation detection algorithm is proposed.Through the sequence loop method,the tail of the half frame data is extended to ensure sequence integrity.On this basis,the overlapping segmentation is performed to reduce the related complexity and according to the result of threshold operation,whether the synchronization sequence is successfully detected is determined.Simulation results show that,compared with the fast frequency domain correlation algorithm,the computational complexity of the proposed algorithm is reduced by 53.85 %,and for different segmentation numbers,the correct detection rate approaches 1.0 when the Signal-to-Noise Ratio(SNR) is -7 dB,which shows a stable detection performance.

关 键 词：LTE-A系统 同步信号 频域快速相关算法 序列循环延迟 重叠分段 

分 类 号：TN929.5[电子电信—通信与信息系统]