DVB-S2中基于RM码的ACM模式帧同步设计  

Design of Frame Synchronization in ACM Scheme of DVB-S2 with RM Code

作　　者：闫朝星[1] 王华[1] 匡镜明[1] 韩术[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2011年第2期196-200,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61072049)

摘　　要：设计和分析了DVB-S2系统中自适应编码调制(ACM)模式下基于里德-穆勒(Reed-Muller,RM)码的帧同步技术.从最大似然角度分析了一阶RM码基于快速哈达玛变换(FHT)的译码算法.采用差分相关技术检测帧头,提出一种降低误帧率的RM码译码实现方法,将帧头段的偶数位数据共轭叠加到奇数位信号上再译码.仿真结果表明,这种方法的译码性能不受任何大小相位偏差的影响,且实现复杂度较小.The algorithm analysis of frame synchronization techniques with RM code were given for the adaptive coding and modulation（ACM） scheme in next generation satellite digital video broadcasting（DVB-S2）.Based on maximum likelihood criterion,the principle of decoding RM code by fast Hadamard transformation（FHT） was analyzed.As the differential correlation detection method was employed to detect the location of frame header,a method to improve the frame error rate performance of RM decoding was presented.After combining the odd header symbols with the conjunction of even frame header symbols,the decoding performance will be robust to any phase offsets with low implementation complexity.

关 键 词：第二代数字卫星广播标准 帧同步 自适应编码调制 里德-穆勒码 快速哈达玛变换 

分 类 号：TN911.72[电子电信—通信与信息系统]