一种改进的DVB-S2接收机帧同步方案  

Improved Frame Synchronization Scheme for DVB-S2 Receiver

作　　者：张玉龙[1] 陈绪斌[1] 吴川[1] 曾晓洋[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《计算机工程》2011年第2期258-260,共3页Computer Engineering

基　　金：上海市科委基金资助项目(08700741100)

摘　　要：帧同步是DVB-S2系统接收机进行解调的基础。通过对已有帧同步方案进行综合研究和比较,提出一种改进的基于导频符号相关辅助和双峰值检测的DVB-S2接收机帧同步方案。与已有方法相比,该方案明显降低了帧同步错误概率,运算复杂度较低。实验结果表明,即使在DVB-S2标准规定的最恶劣的条件下(5 MHz归一化载波频偏和-2.35 dB的信噪比),该方案仍能快速准确地完成帧同步。Frame synchronization is the basis of DVB-S2 demodulation. With the comprehensive study and comparison of the existing methods, this paper presents an improved frame synchronization scheme for DVB-S2 system based on pilot symbols correlation and double-peak detection. The proposed scheme reduces the false synchronization probability significantly with relatively lower computational complexity in contrast to the existing methods, which is evaluated by extensive experiments. In addition, it can acquire frame synchronization rapidly and correctly even under the worst channel condition specified by DVB-S2 standard （5 MHz frequency offset and -2.35 dB signal-to-noise ratio）.

关 键 词：帧同步 DVB-S2系统 导频符号相关 双峰值检测 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]