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Series low-density even-odd check code decoder for supporting multi-rate multi-code-length

A low-density parity and decoder technology, which is applied in the field of serial low-density parity-check code decoders, can solve the problem of inability to provide multiple codeword lengths and multiple encoding rates for decoding, high design complexity, and Poor code performance and other problems to achieve the effect of simplifying design complexity, improving throughput and reducing area

Inactive Publication Date: 2009-10-21
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of poor decoding performance in the above-mentioned schemes, high design complexity, and inability to provide decoding for various codeword lengths and various encoding rates, the present invention proposes a serial code supporting multiple rates and multiple code lengths. Row LDPC Decoder

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  • Series low-density even-odd check code decoder for supporting multi-rate multi-code-length
  • Series low-density even-odd check code decoder for supporting multi-rate multi-code-length
  • Series low-density even-odd check code decoder for supporting multi-rate multi-code-length

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Embodiment Construction

[0020] The definition of LDPC code comes from its sparse parity check matrix H M×N , for check matrix H 1

[0021] H 1 = 1 0 1 0 0 1 0 1 0 1 0 0 1 0 0 0 1 0

[0022] Its rows and columns correspond to the two-way graph (such as Fi...

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Abstract

The invention discloses a serial low-density parity check code decoder supporting multiple rates and multiple code lengths. The improved layered belief propagation algorithm is adopted to speed up the convergence speed of iterative decoding; in addition, the present invention abandons the minimum sum operation with simple structure but poor performance, but uses approximate minimum operation instead, without loss Under the premise of the performance of the decoder, the usage of the memory in the serial decoder is reduced, and the area occupied by the module on the chip is reduced. The invention provides a serial decoding scheme for LDPC decoding in wireless communication, which can support input code words of different lengths at various coding rates.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a serial low-density parity check code decoder supporting multiple rates and multiple code lengths in error correction coding. Background technique [0002] Low-density parity-check (low-density parity-check, LDPC) code, as a linear error correction code, has excellent performance close to the Shannon limit, and has been written into the IEEE802.11n and IEEE802.16e protocols. Many communication protocols require the LDPC encoder to be able to adjust the encoding rate and codeword length of the current data frame in real time according to the user information fed back by the channel, which requires the decoder to also provide support for multiple encoding rates and different codeword lengths . Generally speaking, although parallel decoding can provide a higher throughput rate, its structure is rigid and the hardware complexity for its implementation is relatively high. In c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
Inventor 张朝阳周喜渝
Owner ZHEJIANG UNIV
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