Punctured Turbo code blind identification method under error code condition

A technology for blind identification and punctured convolutional codes, applied in the field of coding parameter identification, can solve the problems of poor error tolerance of punctured turbo code identification and difficulty in reconstructing the interleaving relationship of punctured turbo codes.

Active Publication Date: 2017-11-21
XIDIAN UNIV
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Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: the identification error tolerance of the current p...

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  • Punctured Turbo code blind identification method under error code condition
  • Punctured Turbo code blind identification method under error code condition
  • Punctured Turbo code blind identification method under error code condition

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Embodiment Construction

[0065] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0066] The present invention performs the lower triangular transformation on the matrix on the Galois field GF2, compared with the traditional method of calculating the rank of the matrix, it can largely eliminate the influence of bit errors on the identification of the interleaving length, and the identification result of the interleaving length is as follows: figure 1 shown. When the present invention recognizes the structure of the RSC encoder, it evaluates the confidence degree of the verification relationship obtained by the Hadamard transformation, and screens the verification vector and the starting point of the grou...

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Abstract

The invention belongs to the technical field of coding parameter identification and discloses a punctured Turbo code blind identification method under an error code condition. Lower triangular transformation is carried out for a matrix at a galois field GF2; compared with a traditional matrix rank-solving method, the punctured Turbo code blind identification method under the error code condition can remove influences from the error codes to the identification of the code length and the interlacing length to a great extent. Confidence coefficient evaluation is carried out for a verification relationship obtained through Hadamard Transform when punctured Turbo code blind identification method is used for identifying the start point of a group and the length of a register, the identification rate of the start point of the group and the length of the register is increased greatly. The provided method of identifying an interlaced mapping relationship has strong anti-error-code performance as identification is carried out after removal of the error code; and the solving method for the interlacing relationship has the characteristics of low complexity and easy implementation.

Description

technical field [0001] The invention belongs to the technical field of encoding parameter identification, and in particular relates to a blind identification method of a punctured Turbo code under a code error condition. Background technique [0002] In 1993, Berrou and Glavieux et al. proposed Turbo code (PCCC), whose essence is to combine convolutional code and interleaver. A typical turbo code encoder usually consists of two component encoders, an interleaver, and a puncture complex Composed of modules. The component encoder is usually a Recursive System Convolutional (RSC). The two component encoders are RSC1 and RSC2, and the information sequence X 0 Divided into two paths, the first path directly passes through the component encoder RSC1 for convolutional code encoding to form a check sequence X 1 . The second path first passes through the interleaver, and then performs convolutional code encoding through the RSC2 encoder to form X 2 . In order to improve the cod...

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0038H04L1/0059H04L1/0061H04L1/0071
Inventor 陈健王艳涛郭永斌杨龙阔永红
Owner XIDIAN UNIV
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