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Method for recognizing blindly convolution code coding parameter of tolerant error code

A technology of coding parameters and convolutional codes, applied in the field of channel coding identification algorithms, can solve the problems that information cannot arrive in real time and accurately, and achieve the effects of stable performance, high identification accuracy and simple algorithm.

Active Publication Date: 2009-10-14
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0002] At present, due to factors such as channel and time delay in intelligent communication, information may not arrive in real time and accurately, and sometimes it is necessary to change the coding system according to changes in the environment and time. In this communication environment, it is impossible to achieve synchronous communication through protocols, so Need for quick identification of coding schemes

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  • Method for recognizing blindly convolution code coding parameter of tolerant error code
  • Method for recognizing blindly convolution code coding parameter of tolerant error code
  • Method for recognizing blindly convolution code coding parameter of tolerant error code

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Embodiment Construction

[0016] The principle of the invention is to design a structured model for blind identification of error-tolerant channel coding without protocol communication, establish a mathematical model of the structured model, and effectively identify the model, thereby realizing blind identification of error-tolerant channel coding without protocol communication.

[0017] The present invention comprises steps:

[0018] ① The received data is divided into n channels according to the estimated code rate, and the first and second channels of data codewords are selected to construct an overdetermined linear equation system in the binary domain, where n is a natural number greater than or equal to 2.

[0019] Embodiment sets m=(m 0 , m 1 ,...,m N-1 ) is a finite-length sequence on the field F. According to the definition of convolutional code, its encoded code sequence C=(c 0 , c 1 ,... c 2N-1 ). The generator matrix G of the code x Written in the functional form of D: G(D)=[g (1，1)...

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Abstract

The invention discloses a method for blindly recognizing convolution code coding parameter of tolerant error code, relating to the technology of intelligent communication, communication reconnaissance and information security in the communication field. The method comprising the following steps of: adopting a linear equation for forming two element field for the coding parameter to be recognized; then solving a fault-tolerant linear equation by conducting Walsh-Hadamard transform to an equations set to recognize the coding parameter of the convolution code, and realizing the blind recognition of the coding parameter of the convolution code only through communication content; and finally achieving the purpose of intelligent communication and communication reconnaissance. The method is characterized by simple algorithm, stable and steady performance, high accuracy and the like, and is especially applicable to the channel coding recognition algorithm in the fields of intelligent communication, communication reconnaissance, radiodetection, communication countermeasure, etc.

Description

technical field [0001] The invention relates to an error-tolerant convolution code encoding parameter blind identification method in the field of communication, and is especially suitable for channel encoding identification algorithms in the fields of intelligent communication, communication reconnaissance, radio detection, communication confrontation and the like. Background technique [0002] At present, due to factors such as channel and time delay in intelligent communication, information may not arrive in real time and accurately, and sometimes it is necessary to change the coding system according to changes in the environment and time. In this communication environment, it is impossible to achieve synchronous communication through protocols, so Rapid identification of coding schemes is required. In the field of information interception, channel coding parameters are identified according to the intercepted data to obtain more original information, which provides a relia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/23
Inventor 刘健陈卫东周希元高新华吴宁孙强
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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