Research On The Technology Of Convolutional Code Blind Identification

In the communication system,the information in the channel transmission will encounter various forms of interface,in order to ensure the quality of information transmission and improve the reliability and validity during the transmission,then use the technology of channel coding.in non-cooperative field,in order to obtain more effective information,channel coding recognition technology is used,channel coding recognition technology refers to the identification of the received coded data under the condition of unknown prior knowledge or known part of prior knowledge,and then obtains reliable information.so it is great theoretical and practical value to research this technology.The existing recognition algorithms mainly aim at the recognition of convolutional codes of low bit rate,and the recognition rate is not high.For non-system convolution with high bit rate The existing algorithm cannot recognition it,For the punctured convolutional code,the existing algorithm is mainly for the mother code rate is 1/2,and the calculation of the algorithm is high complexity,the existing algorithm cannot be effectively identified the mother code rate is 1/ n.In addition,existing algorithms have some other disadvantage,including the poor fault tolerance and requiring a great amount of data.This paper proposed a blind identification algorithm for convolution code algorithms based on previous studies,for the conventional convolutional code,the algorithm is used to solve the code length of the non-correlation column,and then a convolutional code blind recognition algorithm based on the statistical principle is proposed to identify the length of k and calibration sequence,which overcomes the shortcomings of the traditional recognition method with low recognition rate at high error rate.In the case of high bit rate,this paper uses the improved method based on the check polynomial to identify the generate matrix.For the punctured convolutional code,the iterative algorithm is proposed to identifies the deletion mode and the parent code,completes the parent code is the code rate to remove the convolutional code blind recognition,Finally,through the simulation analysis,the convolutional code blind recognition algorithm proposed in this paper can achieve good recognition effect and can meet the demands in practice.