Punctured Turbo code blind identification method under error code condition

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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Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: the identification error tolerance of the current punctured Turbo codes is poor, and the interleaving relationship of the punctured Turbo codes is difficult to reconstruct

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