A coding device and method for low density parity check code of supporting any code rate/code length

A technology of low-density parity and coding method, which is applied in error detection coding, coding, coding components and other directions using multi-bit parity bits, which can solve the problem that LDPC codes cannot use the same codec

Active Publication Date: 2007-04-25
ZTE CORP
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Problems solved by technology

[0032] The purpose of the present invention is to solve the problem that LDPC codes of different code rates cannot use the same codec, provide a newly designed codec and method, and im

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  • A coding device and method for low density parity check code of supporting any code rate/code length
  • A coding device and method for low density parity check code of supporting any code rate/code length
  • A coding device and method for low density parity check code of supporting any code rate/code length

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Embodiment Construction

[0091] The basic idea of ​​the present invention is, based on the structured LDPC code with a specific code rate and variable code length, the design principle is that the number of actual coded parity bits is as close as possible to the number of structured LDPC parity bits, and the LDPC The coding and decoding of low-density parity-check codes with any code length and any code rate are realized by shortening or deleting or repeating or adding 0 under the condition that the code has an optimal order distribution.

[0092] Fig. 1 is a schematic diagram of the system where the device of the present invention is located. The encoding device of the present invention is the channel encoder in FIG. 1 . The channel coder implements channel coding: it is to ensure the reliability of communication. It will code the above-mentioned source coded data, add redundant bits, and ensure that it can be corrected at the receiving end to improve communication quality and reliability. Generally...

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Abstract

The invention relates to a low-density parity check code method which supports any code rate/length, and a relative device. Wherein, said device comprises an expand factor z calculator, to calculate out expand factor and output z value to shorten coder; a shorten coder for obtaining the shortened data and outputting it to delete code bit device; a delete code bit device for inputting shorten code, selecting and deleting the bit at certain position with confirmed property of delete code, and outputting the code after deletion. The invention can produce a coder with different code ratios and different code lengths of LDPC code, while they have unique base matrix. The invention can save hardware cost, improve code flexibility and improve its application.

Description

technical field [0001] The present invention relates to a coding device and method for data transmission error correction in a digital communication system, in particular to a coding device and a low-density parity-check code supporting any code length and any code rate in the error correction technology in the digital communication field. method. Background technique [0002] All digital communication systems require a channel encoder. The channel coder is to fight against all kinds of noise and interference in the transmission process. By artificially adding redundant information, the system has the ability to automatically correct errors, thereby ensuring the reliability of digital transmission. Low-density parity-check codes are a type of linear block codes that can be defined by a very sparse parity-check matrix or a bipartite graph. They were originally discovered by Gallager, so they are called Gallager codes. After decades of silence, with the development of comput...

Claims

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Application Information

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IPC IPC(8): H03M13/11H03M13/00
Inventor 徐俊胡留军赵盟
Owner ZTE CORP
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