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Horizontal operating method, horizontal operating device and LDPC (Low Density Parity Check) decoder in LDPC decoding

An operation method and technology of an operation device, which are applied in the direction of error correction/detection using block codes, error detection coding using multi-bit parity bits, data representation error detection/correction, etc., and can solve decoding performance degradation, errors, etc. problem, to achieve the effect of improving performance and improving performance

Active Publication Date: 2010-10-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the input values ​​are not much different, it will bring more obvious errors, resulting in a decline in decoding performance.

Method used

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  • Horizontal operating method, horizontal operating device and LDPC (Low Density Parity Check) decoder in LDPC decoding
  • Horizontal operating method, horizontal operating device and LDPC (Low Density Parity Check) decoder in LDPC decoding
  • Horizontal operating method, horizontal operating device and LDPC (Low Density Parity Check) decoder in LDPC decoding

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Embodiment

[0052] This embodiment uses a lookup table of 16*16, and the lookup table can be obtained in the following manner:

[0053]1. For each pair of indexes in the two-dimensional table (x 1 ', x 2 ’), do coordinate transformation in order to find the correction item corresponding to the pair of indices:

[0054] Depend on x 1 ′ = min ( x 1 , x 2 ) x 2 ′ = | x 2 - x 1 | The inve...

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Abstract

The invention discloses a horizontal operating method, a horizontal operating device and an LDPC (Low Density Parity Check) decoder in LDPC decoding. The method comprises the steps of: carrying out coordinate transformation and quantization on two inputs to obtain a pair of indexes of a lookup table; looking up the lookup table according to the indexes to obtain correction items corresponding to the indexes; and adding the minimum values in the two inputs with the correction items and outputting. The invention can improve the performance of an LDPC decoding algorithm based on a Min-Sum algorithm.

Description

technical field [0001] The invention relates to the technical field of digital information communication, in particular to a horizontal operation method in LDPC decoding, a horizontal operation device in an LDPC decoder and an LDPC decoder. Background technique [0002] Low Density Parity Check Code (LDPC code) is a linear block code constructed based on a sparse check matrix. This kind of code was first proposed by Gallager in 1962, but it did not attract people's attention at that time. It was not rediscovered until the 1990s and attracted widespread attention in the academic circle. LDPC code has the performance that can approach the limit of channel capacity, so it has been applied in some commercial systems such as my country's first generation terrestrial digital TV broadcast transmission standard DTMB, Europe's second generation terrestrial digital TV broadcast transmission standard DVB-T2, etc., and is still It has great application potential. [0003] There are man...

Claims

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Application Information

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IPC IPC(8): H03M13/11
Inventor 王昭诚钱辰雷伟龙刘在爽张超
Owner TSINGHUA UNIV