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Self-adaptive iterative decoding method for Turbo product codes

An adaptive iterative and iterative decoding technology, applied in the field of channel codec, adaptive iterative decoding method and device, can solve the problems of power consumption waste and so on

Active Publication Date: 2012-07-11
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

[0006] 3. Common turbo product code decoding methods
[0012] Most of the traditional iterative decoding methods choose to use a fixed number of iterations. These schemes cannot give optimal decoding results under different signal-to-noise ratios. To unnecessary waste of power consumption

Method used

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  • Self-adaptive iterative decoding method for Turbo product codes
  • Self-adaptive iterative decoding method for Turbo product codes
  • Self-adaptive iterative decoding method for Turbo product codes

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Embodiment Construction

[0059] Further description will be given below in conjunction with the accompanying drawings and embodiments.

[0060] refer to figure 1 , the present invention is applied to the adaptive iterative decoding device of Turbo product code and comprises: memory, is used for storing the simulation sample data of the channel environment value obtained by MATLAB simulation and corresponding iteration factor; Channel environment estimation module, according to from the demodulation terminal The soft information R estimates the channel environment value S; the iteration factor selection module is used to select a group of iteration factors corresponding to the closest channel environment value from the memory for different channel environment values ​​S; the Turbo code SISO iterative decoder is used for all Decode the soft information R and the iterative factor selected by the iterative factor selection module; The control signal is connected to the control terminal of the iterative ...

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Abstract

The invention provides a self-adaptive iterative decoding method for Turbo product codes. The self-adaptive iterative decoding method comprises the steps as follows: channel environment values obtained through simulation and simulation samples of corresponding iterative factors are stored in a storer; the channel environment values S are estimated according to soft information R output by a demodulation terminal; corresponding groups of most suitable iterative factors are selected according to different channel environment values S; then the soft information R and the selected iterative factors are sent into a Turbo code soft-input soft-output (SISO) iterative decoder to be decoded; a code word of the current time of decoding is detected by an iterative stopping judging unit and compared with a code word of the last time of decoding; and when the distance between the code word of the current time of decoding and the last time of decoding is smaller than or equal to an iterative threshold, the decoding is stopped and the code words are output, otherwise iterative decoding is continued. The self-adaptive iterative decoding method has the advantages that suitable iterative factors can be selected according to different channel environments to realize optimal decoding, the iterative times are selected in a self-adaptive manner, and power consumption of a receiver is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to channel coding and decoding technology in communication, in particular to an adaptive iterative decoding method and device applied to Turbo product codes. Background technique [0002] 1. Introduction to Turbo Product Code [0003] Berrou et al first proposed the concept of Turbo code in 1993, Turbo code can obtain error correction performance close to the Shannon limit, and began to implement applications in various communication systems. Afterwards, Turbo product codes were developed on the basis of Turbo codes. The performance of the product code is closer to the Shannon limit, and it is simple to implement and has less decoding complexity. Therefore, the Turbo product code has been extensively studied after it was proposed, and has also been widely used in various communication fields. [0004] 2. The coding principle of Turbo product code [0005] We take the two-dimens...

Claims

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Application Information

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IPC IPC(8): H03M13/29
Inventor 权进国陈海飞
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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