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Coding and decoding method and device based on LDPC cascade

A technology of LDPC codes and encoding methods, which is applied in the field of encoding and decoding methods and devices based on LDPC cascading, can solve problems such as high hardware complexity, achieve low complexity, reduce support for multiple code rates, and simplify encoding and decoding

Pending Publication Date: 2021-06-25
NUFRONT MOBILE COMM TECH
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  • Coding and decoding method and device based on LDPC cascade
  • Coding and decoding method and device based on LDPC cascade
  • Coding and decoding method and device based on LDPC cascade

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[0029] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

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Abstract

The invention provides a coding and decoding method and device based on LDPC cascading. The method comprises the steps: cascading a long code (LDPC code) and a short code (RM code), wherein error bits which are not completely corrected by an inner code LDPC code can be corrected by an outer code RM code, and due to cascaded joint iterative decoding, more error bits can be corrected. Therefore, the cascade code can realize a lower error code platform; Multiple code rates are supported, and when the code length and the code rate of a long code (LDPC code) are fixed, flexible multiple code rates can be supported by using RM codes with different code rates; the implementation complexity is low, the hardware complexity mainly focuses on the encoding and decoding of LDPC codes and RM codes, and the encoding and decoding are relatively simple, so the effects of reducing the error code platform and supporting multiple code rates can be realized under the condition that a small amount of complexity is increased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an encoding and decoding method and device based on LDPC cascading. Background technique [0002] Channel coding is used to detect and correct the errors of signals in the transmission channel, and it is the key technology to ensure the reliable transmission of signals. As one of the core technologies, channel coding technology is widely used in wireless / wired communication systems and digital storage systems. [0003] With the diversification of data service types, LDPC (Low Density Parity Check) codes in some current standards or systems cannot meet the needs of some services, mainly due to the high error platform and high coding rate. not flexible. High-reliability services have stricter requirements on the packet error rate (BLER), which is generally on the order of 10e-8 or even lower. The LDPC codes in the existing standards generally correspon...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11
CPCH03M13/1108H03M13/1111H03M13/1148
Inventor 刘飞雷俊刘慎发鲍东山
Owner NUFRONT MOBILE COMM TECH
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