A layered LDPC decoding method based on dynamic change of h-matrix layer processing order

Abstract

The invention belongs to the technical field of wireless communication, and discloses a layered LDPC decoding method based on the dynamic change of the processing sequence of the H matrix layer, which transmits the information of the H matrix according to the layer processing sequence, and adopts the processing of the H matrix layer in each iteration A new decoding method that reorders the sequence to achieve the purpose of improving the decoding and error correction performance. In each iteration, the processing sequence of the decoding layer is reordered according to the degree value of each layer of the H matrix. The degree value indicates the possibility of errors in the check node set of each layer. The larger the value is, the easier it is for each check node set to appear. Error, update the information of the corresponding layers of the H matrix in order of value from large to small. Compared with the traditional layered LDPC decoding algorithm that uses a fixed H matrix layer processing order for decoding, it can speed up the decoding and error correction speed and improve Decoding performance; can reduce decoding complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a layered LDPC decoding method based on a dynamically changing H matrix layer processing order. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: channel coding technology plays a key role in the information transmission process of the communication system, and is used to ensure reliable transmission of information. Among many error-correcting coding techniques, the low-density parity-check (LDPC) code proposed by Gallager in 1961 has become the research field of channel coding in modern communication systems because of its advantages of error-correcting performance very close to the Shannon limit. hotspot. With the continuous development of wireless communication technology, mobile communication technology has developed from 1G (1st Generation Mobile Communication Systems, the first gener...

AI Technical Summary

Problems solved by technology

However, in the situation where 5G has higher requirements on decoding performance and decoding speed in the future, the traditional layered LDPC decoding algorithm uses a fixed H matrix layer processing order for decoding, and cannot prioritize the check nodes with a high probability of error. set, resulting in slow decoding and error correction speed, unable to achieve better decoding performance, so it is necessary to further study the LDPC decoding algorithm with better decoding performance under the 5G standard

Although the traditional Belief Propagation (BP) decoding algorithm has good decoding performance, it has high decoding complexity and is not suitable for hardware implementation.

[0003] To sum up, the problem existing in the prior art is: the decoding performance of the traditional layered LDPC decoding algorithm is low

Although the traditional Belief Propagation (BP) decoding algorithm has good decoding performance, it has high decoding complexity and is not suitable for hardware implementation.

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