A Blind Identification Method of Coding Parameters of Arbitrary Bit Rate Convolutional Codes with High Bit Errors

Abstract

The present invention discloses a high bit error arbitrary bit rate convolutional code coding parameter blind identification method. The method includes the steps of ranking a convolutional code bit stream to form a p*q bit rate analysis matrix, and identifying a code length n; constructing an analysis matrix for the conventional code bit stream according to the code length n, and extracting a verification sequence of the conventional code; when the bit rate is 1 / n, traversing m so as to directly extract the verification sequence and perform conventional operation with an (m+1)-dimensional vector space, and obtaining a generation matrix of the conventional code and a length m of a register through triangular transformation; when the bit rate is (n-1) / n or (n-k) / n, for a system code, traversing m so as to extract the verification sequence and perform conventional operation with the (m+1)-dimensional vector space, and performing triangular transformation so as to obtain a conventional code generation matrix; and for a non-system code, obtaining a generation matrix set, and finally, obtaining an optimal generation matrix of the conventional code and the length m of the register according to an optimal rule. Through adoption of the method, under a condition of bit error, arbitrary bit rate conventional code coding parameter blind identification is realized, so that the method is applicable to communication detection, communication confrontation and intelligent communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for blindly identifying encoding parameters of a convolutional code with a high error rate and arbitrary code rate. Background technique [0002] In the field of digital communication, convolutional codes have simple encoding methods and relatively high encoding and decoding performance, so they are widely used in satellite communication, deep space communication, broadband mobile communication and other environments. 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] At present, the recognition of...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for blind recognition of coding parameters of arbitrary code rate convolutional codes with high bit errors, aiming at solving the problem that the current recognition of convolutional codes has poor error tolerance and cannot be used effectively for high code rates and non-systematic codes. identify the problem

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