System convolutional code blind recognition method with error tolerance code

The invention belongs to the technical field of communication and relates to a system convolutional code blind recognition method with an error tolerance code. A recognition algorithm for solving a key equation is promoted at a non 1/2 code rate; and the code rate is discriminated and obtained by using the relationship between the order of a coefficient matrix of a correct solution and the order of a coefficient matrix of a wrong solution. A generated matrix is recovered and obtained by adopting a check matrix, and parameter estimation on the system convolutional code is completed. The algorithm adopts multiple sections of data for comprehensive analysis to solve the check matrix, has error tolerance code performance and is applicable to a system convolutional code with a large constraintlength. 本发明属于通信技术领域，涉及种容误码的系统卷积码盲识别方法。首先在非1/2码率下推广了求解关键方程的识别算法，利用正确解的系数矩阵阶数与错误解的系数矩阵阶数关系判别得到码率。采用校验矩阵恢复得到生成矩阵，完成了系统卷积码的参数估计。算法采取多段数据综合分析求解校验矩阵，具有容误码性能，且适用于约束长度较大的系统卷积码。