Parameter blind identification method of puncturing turbo code component coder

Abstract

The invention relates to a parameter blind identification method of a puncturing turbo code component coder, belonging to the technical field of the code identification in a communication system. The method comprises the steps of multiplexing a puncturing turbo code information bit and a verification bit to form a puncturing convolutional code, carrying out statistics and analysis for the code length and a code word starting point of the puncturing convolutional code by virtue of a linear matrix analysis method, identifying a verification matrix of the component coder by utilizing partial Walsh-Hadamard conversion, obtaining a puncturing mode and generating a matrix further by virtue of a Gaussian elimination method, carrying out the blind identification on the parameters of the puncturing turbo code component coder, and verifying the accuracy of the identified parameters. By adopting the method, the operation complexity of identifying the component coder parameter can be alleviated, the identification efficiency and the identification reliability can be improved, and the method is applicable to the fields of the intelligent communication, information processing and the like.

Description

technical field [0001] The invention relates to a parameter blind identification method of a punctured turbo code component encoder in a digital communication system, and belongs to the technical field of code word identification in a communication system. Background technique [0002] The punctured turbo code is widely used in modern communication. With the development of digital communication technology, more and more fields will have the demand for the blind recognition technology of the punctured turbo code. The blind recognition technology of the punctured turbo code has also become the frontiers of research. [0003] The classic parallel concatenated turbo code encoder is mainly composed of two recursive systematic convolutional code (RSC) component encoders connected in parallel, and the component encoders are connected by an interleaver. In general, the structure of each RSC encoder is the same , the code rate of the turbo code using two RSC component encoders is 1 / ...

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Problems solved by technology

[0004] For the blind recognition of (n-1) / n-type punctured convolutional codes based on 1 / 2 source convolutional codes, the traditional Walsh-Hadamard transform requires relatively high memory space. Wang Lei, Hu Yihua, Wang Yong et al. Published in the 16th issue of "Computer Engineering and Application" "PWHT-based Deletion Convolutional Code Recognition Method", aiming at the Walsh-Hadamard transform in the detection matrix of the deletion convolutional code, there are too many calculations and data. The problem is that the check matrix equations are deformed, and the partial Walsh-Hadamard transform (PWHT) is proposed, but the method for blind identification of the parameters of the component encoder of the punctured turbo code is not given.

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