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）.
出处
《计算机工程》
CAS
CSCD
北大核心
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)
关键词
帧同步
DVB-S2系统
导频符号相关
双峰值检测
frame synchronization
DVB-S2 system
pilot symbols comrelation
double-peak detection
