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Blind recognition method for RS code and punctured convolutional code cascaded code parameters

A punctured convolutional code and blind recognition technology, which is applied in the field of blind recognition of channel coding, can solve the problem of blind recognition of RS code and punctured convolutional code concatenated code parameters, etc.

Inactive Publication Date: 2015-03-25
SHANDONG UNIV
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Problems solved by technology

[0004] In order to overcome the defects and deficiencies in the prior art, the present invention provides a method for blind identification of parameters of concatenated codes of RS codes and punctured convolutional codes to solve the blind identification of parameters of concatenated codes of RS codes and punctured convolutional codes question

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  • Blind recognition method for RS code and punctured convolutional code cascaded code parameters
  • Blind recognition method for RS code and punctured convolutional code cascaded code parameters

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Embodiment

[0061] The embodiment of the present invention is as follows, a kind of RS code and punctured convolutional code concatenated code parameter blind recognition method, carries out data read-in, analysis and calculation processing by computer, and the steps of this method are as follows:

[0062] (1) Part of the data to be identified is read in by the computer from the data to be identified, and the length of the read data is Lr, and Lr should be greater than 35000;

[0063] (2) Assume that the initial value of the starting point Indent of the read data is 0, identify the code length and starting point multiple times, set the variable Index as the number of recognition times of the code length and starting point, and the initial value is 0; set two arrays: respectively Store the code length array Nnum of multiple identifications and store the starting point array BN of multiple identifications;

[0064] (3) Judging whether Indent+26000 is less than Lr, if it is less, then go to ...

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Abstract

The invention provides a blind recognition method for RS code and punctured convolutional code cascaded code parameters and belongs to the technical field of channel code blind recognition. Firstly, a punctured convolutional code parameter blind recognition method based on a Walsh-Hadamard algorithm which is called a WH algorithm for short is adopted for recognizing the code length, the starting point, the puncture mode and generated matrixes of punctured convolutional codes; then, a Viterbi decoding algorithm is used for decoding; next, according to a decoded sequence, a matrix analysis method is adopted for recognizing the interweaving width and the interweaving length, and interweaving is performed according to interweaving parameters; finally, according to an interwoven sequence, RS code parameters are recognized through a traversal method and a fast Fourier transform method in the Galois field. The method for solving the blind recognition problem of the RS code and punctured convolutional code cascaded code parameters is provided, and the RS code small-order recognition rate is improved while recognition data size is reduced.

Description

technical field [0001] The invention relates to a parameter blind recognition method of a RS code and a punctured convolutional code concatenated code in a digital communication system, and belongs to the technical field of channel coding blind recognition. Background technique [0002] Concatenated coding is an effective technique for constructing long codes with strong error-correcting capability from short component codes. Concatenated codes using non-binary codes as outer codes and binary codes as inner codes have been widely used in communication and data storage systems. In most applications, RS codes or BCH codes are used as outer codes and convolutional codes as inner codes. [0003] Concatenated codes have been widely used in various communication occasions because of their better coding gain and lower implementation complexity. "Channel Coding and Its Recognition Analysis" written by Zhang Yongguang and Lou Caiyi respectively gave a method for separately identifyi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/15H03M13/23
Inventor 马丕明张丽媛杨勇
Owner SHANDONG UNIV
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