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LDPC decoding method and decoder

A technology of decoding and channel information, applied in the field of LDPC decoding method and decoder

Inactive Publication Date: 2016-06-15
GUANGXI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is still no good way to make an effective compromise between the decoding performance, decoding complexity, and hardware implementation of the RBI-MLGD algorithm.

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  • LDPC decoding method and decoder
  • LDPC decoding method and decoder
  • LDPC decoding method and decoder

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Embodiment Construction

[0038] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0039] like figure 1 As shown, a kind of LDPC decoding method according to the specific embodiment of the present invention, comprises the following steps:

[0040] Step S101: Obtain channel information, perform non-linear quantization preprocessing on the channel information with the number of quantized bits to obtain reliability information;

[0041] Step S102: Set the maximum number of iterations and start to iterate the reliability information:

[0042] Step S103: Perform hard decision processing on the reliability information to obtain a hard decision vector, and obtain a corresponding symbol vector according to the hard decision vector;

[0043] Step S104: Input the symbol vector into the verification matrix fo...

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Abstract

The invention discloses an LDPC decoding method and a decoder. The method comprises the following steps: obtaining channel information, and carrying out nonlinear quantization preprocessing on the channel information by a quantitative bit number to obtain reliability information; setting a maximum iteration number, and starting to iterate; carrying out hard decision processing on the reliability information to obtain a hard decision vector, and obtaining a corresponding symbol vector according to the hard decision vector; inputting the symbol vector in a verification matrix to be verified, in the case of verification success, ending the iteration and outputting a decode; in the case of verification failure, judging whether the set maximum iteration number is exceeded, and if so, logging out the iteration; and if not, updating the reliability information to carry out the next iteration. The LDPC decoding method provided by the invention can be used for improving the storage load and has very low decoding complexity. Compared with the situation when the nonlinear quantization preprocessing is not carried out, the decoding method can be used for improving the decoding performance for 0.3-0.4dB.

Description

technical field [0001] The invention relates to the field of digital information transmission, in particular to an LDPC decoding method and a decoder. Background technique [0002] LDPC code (LowDensityParityCheckCode) was first proposed by Galleger in the 1960s. Due to the limited technology at that time and the lack of feasible decoding algorithms, LDPC code was basically ignored for more than 30 years after it was proposed. During this period, scholars' research on LDPC codes has never stopped. Tanner promoted the LDPC code in 1981, and gave the graph representation of the LDPC code, that is, the Tanner graph. In 1993, Berrou et al. discovered Turbo codes. On this basis, around 1995, Mackey and Neal et al. re-studied LDPC codes, proposed a feasible decoding algorithm, and further discovered the good performance of LDPC codes. It not only has good performance close to the Shannon limit , and the decoding complexity is low, and the structure is flexible. In the past ten...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11
CPCH03M13/1108
Inventor 陈海强梁奇覃团发黎相成孙友明何英庆黄小栗曹航陈慧娇
Owner GUANGXI UNIV