Turbo码盲识别方法研究  

Research on Blind Recognition of Turbo Codes

作　　者：武恒州[1] 罗霄斌 刘杰[3] 

机构地区：[1]海军驻沈阳地区航空军事代表室,辽宁沈阳110034 [2]海装天津局航空装备处,北京100073 [3]海军航空工程学院,山东烟台264001

出　　处：《无线电工程》2015年第5期24-27,共4页Radio Engineering

摘　　要：Turbo码在数字通信领域应用广泛。针对Turbo码的盲识别问题,给出了码块长度、码字起点、子编码器和交织器的识别方法。引入信息熵对矩阵分析法进行改进,以减小误码对码块长度和码字起点识别的影响,并采用WalshHadamard变换法对子编码器生成矩阵进行识别,给出了一种改进的穷举对比法识别交织关系。仿真结果表明,以上算法能有效识别Turbo码各参数。For the blind recognition problem of Turbo codes,emphasis is placed on research of code block length,code word start- ing point, sub-encoders and interleaver.Firstly,to reduce the impact of errors on code length and code word starting point recognition, information entropy is introduced into the method based on matrix analysis.Then the Walsh-Hadamard transform is adopted to recognize generator matrix of sub-encoders.On the basis of the above research,an improved enumerative comparison method is proposed to recog- nize interleaving relationship.The simulation results show that these algorithms can effectively achieve the recognition goals.

关 键 词：TURBO码 盲识别 矩阵分析 信息熵 Walsh-Hadamard 

分 类 号：TN911.2[电子电信—通信与信息系统]