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Method for duobinary Turbo code to stop iterative decoding

An iterative decoding, duobinary technology, applied in the field of symbol-based duobinary turbo code stop iterative decoding, can solve problems such as increasing overhead

Inactive Publication Date: 2008-09-03
ZHEJIANG UNIV
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Problems solved by technology

On the other hand, if a decoding algorithm based on symbols (bits) is used, and the method of stopping iterative decoding uses a method based on bits (symbols), after each iteration of decoding, it is necessary to convert the information outside the symbols (bits) into bits ( Symbol) information outside the stop judgment, which undoubtedly increases the additional overhead

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  • Method for duobinary Turbo code to stop iterative decoding
  • Method for duobinary Turbo code to stop iterative decoding
  • Method for duobinary Turbo code to stop iterative decoding

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[0023] The sign-based duobinary Turbo code stop iterative decoding method is implemented as follows:

[0024] 1) Before the iterative decoding starts, the initial value of the judgment value (extra-symbol information) required by the iterative decoding stop method is set to 0, the threshold is set to Th, and the maximum number of iterations of the component decoder is set to NTER. FStop represents the sign that the stop condition is satisfied, FStop=0 represents that the stop condition is not satisfied, and FStop=1 represents that the stop condition is satisfied. N represents the length of a frame, and k represents a time variable, taking values ​​from 1 to N.

[0025] 2) At the beginning of each iteration, set FStop to 1. At the end of each iteration process, the component decoder should sequentially output the N-length extra-symbol information sequence {L e (u k =1), L e (u k = 2), L e (u k =3)}, k=1, . . . , N.

[0026] 3) From k=1, proceed according to 4).

[0027...

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Abstract

The invention relates to a stopping method of iterative decoding based on dual-binary turbo code of symbol in communication, which makes use of max-log-map decoding algorithm based on symbolic information of dual-binary turbo code, considers the information exclusive the symbol transferred between component decoder as the conditional judge values to step the iterative decoding method, and compares the values with a threshold value. If at least one absolute value of the information exclusive the symbol is larger than the threshold value, iterative decoding is stopped, on the contrary, the next iterative decoding is performed. The invention combines the symbol decoding algorithm with the symbol stop method, gives attention to the three indexes of decoding performance, decoding complexity and resource occupation, improves the signal-noise ratio of the algorithm under the condition of low complexity, limited resource occupation and ideal decoding complexity.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a method for stopping iterative decoding of duobinary Turbo codes in communication, in particular to a method for stopping iterative decoding of symbol-based duobinary Turbo codes. Background technique [0002] In 1996, Berrou proposed the duobinary Turbo code. Compared with the traditional binary Turbo code, the Duobinary Turbo code has the following advantages: the interleaving depth is half of the classical Turbo code, and the decoding delay is reduced; the minimum freedom is increased by interleaving between symbols. distance, to eliminate the error floor; under the same complexity decoder, the error correction performance of the duobinary Turbo code is better than that of the traditional Turbo code; the impact of code rate puncturing on the performance of the Duobinary Turbo code is less than that of the traditional Turbo code; using cyclic recursion The systematic convo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/29
Inventor 谢磊刘亚陈惠芳高明朱益
Owner ZHEJIANG UNIV
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