Decoding method and device of low density parity code LDPC

A parity code, low-density technology, applied in error detection coding using multi-bit parity bits, error correction/detection using block codes, data representation error detection/correction, etc. , multiple storage space, etc.

Active Publication Date: 2015-11-11
SPACE STAR TECH CO LTD
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Problems solved by technology

[0019] The embodiment of the present invention provides a decoding method and device of a low-density parity code LDPC, which is used to solve the problem that the partial parallel MS decoding method of the binary LDPC code in the prior art occupies a lot of storage space, and the logic of the decoding interface is relatively complicated. The problem of large compilation delay

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  • Decoding method and device of low density parity code LDPC
  • Decoding method and device of low density parity code LDPC
  • Decoding method and device of low density parity code LDPC

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[0059] In order to solve the problem that the binary LDPC code partial parallel MS decoding method in the prior art occupies more storage space, the decoding interface logic is more complex, and the compilation delay is larger, a low-density parity code is provided in the embodiment of the present invention A compiling method for LDPC, the method comprising: step 1, reordering the input channel likelihood value information; step 2, performing parallel variable node update, check node update and decision bit update according to the reordered channel likelihood value information ; Step 3, calculate the checksum, and judge whether the checksum is the preset threshold and whether the number of loop iterations reaches the threshold value, if the checksum is not the preset threshold and the number of loop iterations does not reach the threshold value, then Execute step 4, if the checksum is the preset threshold or the number of loop iterations reaches the threshold, return to step 2;...

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Abstract

The invention discloses a decoding method and device of a low density parity code LDPC. In the implementation process of decoding a binary LDPC (Low Density Parity Code) code by adopting MS, during initialization, a parallel input sequence of channel likelihood information is rearranged according to the structural features of a check matrix, and during each updating, a variable node is updated in parallel according to the sequence; compared to a multiframe parallel decoding structure, the method reduces the complexity of decoding delay, memory space of a decoder and interface control logic on the premise of no loss of performance.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a decoding method and device of a low-density parity code LDPC. Background technique [0002] Low Density Parity Check (LDPC, LowDensityParityCheck) code is a channel decoding widely used in the field of digital information transmission at present. As an ordinary linear block code, LDPC code usually uses generator matrix G and parity check matrix H M×N To represent, M is the number of rows of the check matrix, N is the number of columns of the check matrix, and its characteristics are: the parity check matrix H M×N The number of non-zero elements in is far less than the number of zero elements. [0003] At present, LDPC decoding methods mainly include BP decoding, MS decoding, etc., and the decoding structure is divided into serial, partial parallel and full parallel structures. Among them, some parallel MS decoding methods have a better compromise in terms of decoding com...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11
Inventor 王正陈昕陈茹梅张晔
Owner SPACE STAR TECH CO LTD
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