一种DVB-S2帧同步算法的设计与实现  

Design and Implementation of Frame Synchronization Algorithm for DVB-S2

作　　者：韩星[1] 杨伟 HAN Xing;YANG Wei(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《计算机与网络》2021年第7期60-64,共5页Computer & Network

基　　金：国家部委基金资助项目。

摘　　要：针对低信噪比场景下DVB-S2信号的帧同步及接收解调难题,提出了一种适用于VCM/ACM的工作模式——基于帧信息的低信噪比帧同步算法。该帧同步算法融合了DVB-S2帧内SOF段、PLSC段以及导频段的符号特性,在不同信噪比环境下的误帧率均低于对照算法。利用帧信息优化峰值搜索算法的性能,克服了基于阈值的峰值检测算法对信道衰落极为敏感的缺点,同时突破了窗函数法仅适用于CCM工作模式的弊端,并在FPGA内完整实现了对DVB-S2信号从中频输入到FEC帧输出的处理过程。The problems of frame synchronization and receiving demodulation of DVB-S2 in low SNR condition are analyzed.In view of these problems,a frame synchronization algorithm in low SNR condition based on frame information is proposed,which is suitable for VCM/ACM operating mode.The frame synchronization algorithm combines SOF segment,PLSC segment and pilot segment,and its error rate in different SNR conditions is lower than that of other algorithms.Using frame information to optimize the performance of peak search algorithm,it overcomes the shortcomings of the peak detection threshold algorithm which is sensitive to channel fading,and breaks through the disadvantage that window function method is only suitable for CCM mode.The signal processing from IF signal input to FEC frame output is implemented in FPGA.

关 键 词：DVB-S2 VCM/ACM模式 帧同步算法 

分 类 号：TN911[电子电信—通信与信息系统]