Turbo码盲识别方法研究

Research on Blind Recognition of Turbo Codes

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.