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Blind identification method for pseudo-random interleaving

A pseudo-random and blind recognition technology, applied in digital transmission systems, electrical components, error prevention, etc., to achieve the effect of simple algorithm, clear process and fast recognition speed

Inactive Publication Date: 2014-06-18
36TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] How to correctly identify the pseudo-random interleaving and channel coding related parameters used before interleaving from the information code stream, so as to decode it correctly, is a basic problem in the field of information reconnaissance and information interception, and there are few reports so far

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  • Blind identification method for pseudo-random interleaving
  • Blind identification method for pseudo-random interleaving
  • Blind identification method for pseudo-random interleaving

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Embodiment Construction

[0029] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments. These examples should be understood as only for illustrating the present invention but not for limiting the protection scope of the present invention. After reading the contents of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

[0030] Assuming that the channel coding method used before pseudo-random interleaving is (n, k) linear block code, the information sequence M generates sequence C after block coding, and C generates the transmission sequence U on the channel after pseudo-random interleaving. The interleaving of an interleaving frame The length is L. Usually, in order to ensure the maximum performance of the combination of block coding and interleavi...

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Abstract

The invention discloses a blind identification method for pseudo-random interleaving. In the method, after the interleaving length and the interleaving start of a pseudo-random are determined through linear transformation, mathematic analysis is conducted on a matrix and coding parameters of a block code used before interleaving are determined. By analyzing a relation equation between code elements before and after interleaving, an interleaving rule is found out so as to determine an interleaving relation. The invention better solves the problems of determining the interleaving length of the pseudo-random, determining the interleaving starting point of the pseudo-random, determining the coding parameters of the block code before interleaving, determining the interleaving relation and the like, realizes the interleaving of the pseudo-random and the blind identification of the coding parameters of the block code before interleaving only through communication contents, and has the characteristics of simple algorithm, clear process, high identification speed and the like. The invention is suitable for the fields such as intelligent communication, communication reconnaissance, information counterwork and the like.

Description

technical field [0001] The invention relates to a blind recognition method of pseudo-random interleaving in a digital communication system. The pseudo-random interleaving refers specifically to pseudo-random interleaving of information data after binary linear block code encoding. The invention is applicable to the fields of intelligent communication, communication reconnaissance, information confrontation and the like. Background technique [0002] Pseudo-random interleaving is widely used in modern communications. With the development of digital communication technology, more and more fields will have the demand for pseudo-random interleaving blind recognition technology. Pseudo-random interleaving blind recognition technology is also the frontier of today's communication research. field. [0003] How to correctly identify the pseudo-random interleaving and channel coding related parameters used before interleaving from the information code stream, so as to decode it corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 张永光楼财义
Owner 36TH RES INST OF CETC
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