基于DAB/DMB系统的模式检测及帧同步技术  

A Mode Detection and Frame Synchronization Technique Based on DAB/DMB System

作　　者：葛建明[1] 李兵兵[1] 王雯芳[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071

出　　处：《电视技术》2006年第12期10-12,16,共4页Video Engineering

摘　　要：针对数字多媒体广播(DAB/DMB)系统,提出了一种可实际应用的信号模式检测和时域帧同步技术,该方法是基于信号空符号的能量自适应检测方法(Energy-BasedDetection,EBD)。仿真结果显示其同步性能良好,可推广应用于其他具有多种传输模式的OFDM系统的模式检测及帧同步。与最大似然相关方法相比,实现复杂度低,硬件资源占用少。A method of signal mode detection and time domain frame synchronization is proposed, which can be used in DAB/DMB system. This method is based on energy self-adapted detection of null symbol. Simulation resuh reveals that the proposed method has good performance; it also can be extended and applied in other OFDM systems, which have different transmission modes, for the mode detection and frame synchronization. Comparing with the correlation method of max-likelihood （ML）, the proposed method can greatly reduce the resource usage.

关 键 词：数字广播 移动电视 正交频分复用 模式检测 同步 DMB系统 

分 类 号：TN934.3[电子电信—信号与信息处理]