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A coding method and communication device

A technology for coding and coding blocks, which is applied in the field of coding methods and communication devices, and can solve the problems of not fully combining the characteristics of LDPC codes.

Active Publication Date: 2021-01-15
HUAWEI TECH CO LTD
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Problems solved by technology

[0007] The current bit stuffing methods all uniformly specify the position of the stuffing bits. The stuffing position is either at the head of the coding block or at the end of the coding block. The bit position with higher block degree, but the information bits are placed in the position with lower bit degree or lower block degree, which does not fully combine the characteristics of LDPC codes

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  • A coding method and communication device
  • A coding method and communication device
  • A coding method and communication device

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Embodiment Construction

[0164] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0165] When performing LDPC encoding on the information bit sequence to be transmitted, it is first necessary to construct an LDPC parity check matrix for the wireless communication device. The parity check matrix of an exemplary LDPC code is as follows:

[0166]

[0167] In a wireless communication system, different sizes of wireless resource blocks (resource blocks, RBs) may be allocated to wireless communication devices according to different transmission requirements, and under different sizes of RBs, the LDPC codes that wireless communication devices can support The length also varies.

[0168] In order to make wireless communication devices compatible with LDPC with different code lengths, an m b ×n b The basis matrix H b , and then pre-set the spreading factor z corresponding to each LDPC code length, after the LDPC c...

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Abstract

Disclosed is a method for inserting a fixed bit during encoding of an LDPC code. The method comprises: a sending device divides a transmission block to be sent into at least one code block; insert a fixed bit at a bit position with the lowest bitness or a sub-block with the lowest blockness in at least one of the code block, and perform LDPC encoding on each code block to obtain a plurality of data bit sequences; the sending device sends the data bit sequences; a receiving device decodes after receiving the data bit sequences, and removes the fixed bit from the code block where the fixed bit is inserted. By means of the method, fixed bits are inserted to positions with the lowest reliability, thereby effectively improving the reliability of LDPC encoding.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to an encoding method and a communication device. Background technique [0002] Communication systems employ coding to ensure reliable communication over noisy communication channels. In these communication channels, the bits of each symbol have a corresponding capacity under a certain Signal-Noise Ratio (SNR), for which a theoretical upper limit (Shannon limit) can be defined. Coding schemes aim to achieve rates close to this Shannon limit, and one of the codes close to the Shannon limit is Low-Density Parity-Check (LDPC). [0003] LDPC is a kind of linear block code with a sparse check matrix proposed in 1962, that is, only a small number of elements in the check matrix are "1", and most of them are "0". LDPC makes use of the sparseness of the matrix, so that the decoding complexity is only linearly related to the code length, and it can still be eff...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0061H04L1/00
Inventor 余荣道
Owner HUAWEI TECH CO LTD
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