Blind Identification Method of Coding Parameters of Convolutional Codes

Abstract

The invention discloses a totally blind recognition method for a coding parameter of a convolutional code, which mainly solves the problems of incapability of realizing totally blind recognition and high calculation complexity existing in the prior art. The technical scheme provided by the invention is that: (1) the code length n, the input information bit length k and the register length m are solved according to the mutual check relationship between a convolutional code coder and an information code word; (2) when the code rate k / n is 1 / n, two adjacent bits of the code word in the convolutional code bit stream are taken in sequence to construct an analysis matrix C, and fast Walsh-Hadamard transformation is used for the analysis matrix C to solve a generator matrix G; and (3) when the code rate k / n is (n-1) / n, the first to (n+1)th bits of the code word in the convolutional code bit stream are taken to construct an analysis matrix C, and fast Walsh-Hadamard transformation is used for the analysis matrix G to solve a basic check matrix H; and thus, the totally blind recognition for the coding parameter of the convolutional code is finished. According to the totally blind recognition method, the problem of totally blind recognition for the coding parameter of the convolutional code under the conditions of knowing no priori knowledge and containing an error code are solved well, and the operation complexity is simplified; and the totally blind recognition method can be used for multi-cast communication and intelligent communication.

Description

technical field [0001] The invention belongs to the field of digital communication, relates to blind recognition of coding parameters of a communication system, in particular to an error-tolerant convolution code coding parameter blind recognition method in a non-cooperative situation, and is suitable for multipoint broadcast communication and intelligent communication. Background technique [0002] In the field of digital communication, after obtaining the coded data of the other party, it is necessary to decode the coded data of the other party, so that it is possible to obtain a really useful information sequence, so as to better analyze the useful information in the information data. In this context, how to quickly and efficiently blindly identify the encoding parameters of information sequences has attracted people's attention. [0003] Judging from the current digital communication field, most of them are concentrated on the signal layer, and there are relatively few s...

AI Technical Summary

Problems solved by technology

[0004] This method has a good performance in terms of fault tolerance, but it mainly stays in the case of certain prior knowledge, and does not really achieve full-blind recognition

Taking a step further, the method mentioned in its patent is mainly limited to the range of 1 / 2 code rate. For the case of 1 / n code rate and (n-1) / n code rate, the method mentioned in its patent does not Not very effective, and cannot effectively identify high bit rates

On the other hand, the computational complexity involved in the current identification methods of convolutional codes is relatively high.

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