基于校验矩阵的卷积码识别和码字同步

Convolution Code Identification and Codeword Synchronization Based on Parity-Check Matrix

简要介绍了卷积编码的矩阵描述及其生成矩阵和校验矩阵的关系,从中得出编码序列与校验矩阵之间的数学关系。从而提出了一种以卷积码的校验矩阵为先验知识的卷积码识别方法,利用卷积码的校验矩阵和编码序列的关系对通信侦察系统得到的数据流进行分析,实现对接收序列的编码方式识别和码同步,为进一步的解码工作创造了条件,并用仿真试验在无误码和有误码2种情况下分别验证了该方法的有效性。

The matrix representation of convolution code and the relation between generation matrix and parity-check matrix are introduced briefly. Thus a new method of identification of convolution code based on the transcendent knowledge of parity-check matrix is presented. The method helps identify the type of convolution code and synchronize the codeword of sequence obtained in the communication detecting system through the parity-check matrix and it＇s relation with the data sequence received.The method makes the next step of decoding flexible and is validated by simulations conducted under the conditions that there are errors in the received data sequences and that there are not.