A layered LDPC decoding method based on dynamic change of h-matrix layer processing order
A technology of processing sequence and dynamic change, which is applied in the direction of error detection coding, coding, code conversion, etc. of multiple parity bits. slow speed etc.
Active Publication Date: 2021-11-02
XIDIAN UNIV
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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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[0032] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0033] Such as figure 1 As shown, the layered LDPC decoding method based on the dynamic change of the H matrix layer processing order provided by the embodiment of the present invention includes the following steps:
[0034] S101: Study the characteristics of the node set in the H matrix under the 5G standard that has a great impact on the decoding performance.
[0035] S102: On the basis of the traditional layered LDPC decoding algorithm, study the influence of the decoding method of first processing the check node set that has a greater impact on the decoding performance on the decoding performance;
[0036] S103: Propo...
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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...
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IPC IPC(8): H03M13/11
CPCH03M13/1108H03M13/1148
Inventor郭漪白薇刘刚
OwnerXIDIAN UNIV