窄带干扰对多载波系统定时同步影响的分析  

Analysis of the Narrowband Interference Effect on Multi-carrier Systems Timing Synchronization

作　　者：赵福才[1] 胡以华[1] 郝士琦[1] 闫飞[1] 

机构地区：[1]合肥解放军电子工程学院,安徽合肥230037

出　　处：《电子学报》2009年第1期185-189,共5页Acta Electronica Sinica

基　　金：国家863高技术研究发展计划

摘　　要：S&C算法是基于数据辅助的常用定时同步算法,该算法仅需要一个训练符号,既可用于定时恢复,也可用于载波频率捕获,额外开销小,广泛应用于多载波通信系统中.一般来说,定时估计的性能会受到干扰(如窄带干扰)的影响.分析了窄带干扰信号对多载波系统定时同步的影响,重点分析了窄带干扰情况下S&C定时估计器的性能、训练数据的漏警概率和虚警概率.In multi-carrier systems,the most popular of the pilot-aided timing estimators is the one proposed by Schmidl and Cox（S＆C）, which only one training symbol is used for symbol timing recovery and cartier frequency acquisition. Generally, the proper action of the timing estimator may be strongly affected by the presence of disturbances, like narrowband interference（NBI） signals. This paper investigates the effect of NBI signals, on the timing synchronization for multi-carrier systems. The performance of the S＆C symbol timing synchronizer is evaluated in an analytical way in the presence of narrowband interferers. Also, the probabilities of both missing and false detection of a training sequence are addressed.

关 键 词：多载波系统 窄带干扰 符号定时同步 训练符号 

分 类 号：TN911.7[电子电信—通信与信息系统]