叠加弱能量PN序列DVB-T帧同步算法  

Novel Frame Synchronization Algorithm for Improving the Performance of the European DVB-T System Using Superimposed PN Sequences with Low Power

作　　者：罗仁泽[1] 敬龙江[2] 成先涛[2] 张光玉[2] 朱维乐[2] 

机构地区：[1]电子科技大学中山学院电子工程系,广东中山528402 [2]电子科技大学电子工程学院,四川成都610054

出　　处：《电子学报》2005年第7期1311-1313,共3页Acta Electronica Sinica

摘　　要：本文提出了一种DVB-T2K系统的帧同步新算法以改进高速移动环境同步性能.该算法利用叠加的训练帧的自相关性和保护间隔的循环特性获得同步信号,其中训练帧的能量仅为发射端总能量的1.41%.仿真表明:该算法在150km/h到450km/h的高速移动DVB-T系统能获得良好的帧同步性能;同时,该叠加的PN序列对系统性能的影响可以忽略不计.A novel algorithm has been proposed for the European DVB-T 2K system so as to achieve frame synchronization before the timing synchronization and frequency synchronization and improve the performance of the system in the high-speed mobile multi-path fading channels. In the algorithm the combined correlation detection method has been employed, where the autocorrelation of the superimposed training sequence with the power of 1.41% of the total transmitter power and the cycle characteristic of the guard interval are employed to produce the synchronization signal. Computer simulation shows that the performance of frame synchronization is better than that of the conventional scheme in DVB-T systems with mobile speed from 150km/h to 450km/h. In additional, the superiposed PN sequence exerts little influence on the performance of the system.

关 键 词：DVB-T系统 帧同步 训练序列 融合相关检测法 

分 类 号：TN94[电子电信—信号与信息处理]