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A low-density parity-check code decoding device and decoding method thereof

A low-density parity and decoding device technology, applied in the field of low-density parity-check code decoding devices, can solve the problems of inability to apply high throughput application scenarios, inability to flexibly change parallelism, and high hardware costs, and achieve real-time savings. Calculate rotation value time, avoid de-interleaving processing, implement simple effects in hardware

Active Publication Date: 2019-01-18
SANECHIPS TECH CO LTD
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Problems solved by technology

[0003] The current LDPC decoders in the industry generally adopt the scheme of storing multiple mother code matrices when providing support for multi-code rate decoding, which is relatively complicated to implement and has high hardware costs; moreover, LDPC decoding must be performed according to multiple mother code matrices The information processing units in the coder are configured separately, the operation is complicated, and the degree of parallelism cannot be changed flexibly, so it cannot be applied to high-throughput application scenarios

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  • A low-density parity-check code decoding device and decoding method thereof
  • A low-density parity-check code decoding device and decoding method thereof
  • A low-density parity-check code decoding device and decoding method thereof

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Embodiment Construction

[0048] The present invention adopts layered modified minimum sum belief propagation (BP, Belief Propagation) decoding algorithm, and described algorithm is based on LDPC parity check matrix H (m * z) * (n * z), and described parity check matrix passes Unified Mother Code Matrix H b (m × n) expansion is obtained, and the corresponding expansion factor is z; wherein, m × z is the number of digits of the check bits of the parity check matrix, and n × z is the number of bits of soft information corresponding to the parity check matrix Code length, correspondingly, the full code rate corresponding to the mother code matrix is ​​s\n.

[0049] The layered modified minimum sum BP decoding algorithm is specifically:

[0050] 1. Use channel soft information codeword bit y n For bit soft information codeword bit q n The logarithmic likelihood ratio (LLR, (Log-Likelihood Ratio) is initialized, and the information codeword bits r outside the check node are initialized at the same time ...

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Abstract

Disclosed is a decoding method of a low-density parity-check code (LDPC) decoding device, comprising: initializing bit soft information by filling channel soft information of the full bit rate corresponding to a uniform mother code matrix and calculating new bit soft information according to a preset rotation shift value; and outputting a hard decision result of a codeword bit that is in the new bit soft information and corresponds to a non-filling codeword bit in the initialized bit soft information when the hard decision result of a codeword bit that is in the new bit soft information meets a decoding output condition or the number of times of calculating the new bit soft information reaches a preset maximum value. Also disclosed is an LDPC decoding device. The technical solutions of the present invention can easily support multiple-bit-rates decoding, resulting in low hardware cost and flexible configuration, and are applicable to an application scenario of large throughput.

Description

technical field [0001] The present invention relates to decoding technology, in particular to a Low Density Parity Check Code (LDPC, Low Density Parity Check Code) decoding device and a decoding method thereof. Background technique [0002] With the wide application of communication services such as multimedia, broadband mobile, and microwave, the communication system puts forward higher requirements for transmission capacity and reliability. The coding scheme based on LDPC technology is widely used in many communication systems, including WiMax (Worldwide Interoperability for Microwave Access) based on IEEE802.16e, for its powerful channel error correction coding ability and good transmission reliability. Standard mobile broadband system, digital satellite broadcasting system based on DVB-S2 standard and digital high-definition broadcasting system based on Terrestrial Digital Multimedia TV / Handle Broadcasting (DMB-TH, TerrestrialDigital Multimedia TV / Handle Broadcasting) st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
CPCH03M13/1117H03M13/1137H03M13/6508H03M13/6519
Inventor 张晓鹏付华杰
Owner SANECHIPS TECH CO LTD
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