LDPC Decoder for CCSDS Code by Flipping Bits and Fetching Words  

作　　者：WU Tao LIU Hailiang 

机构地区：[1]Shenzhen Research Institute of Sun Yat-sen University,Shenzhen 518057,Guangdong,China [2]Guangzhou Institute of Artificial Intelligence and Advanced Computing,Institute of Automation of Chinese Academy of Sciences,Guangzhou 510530,Guangdong,China

出　　处：《Wuhan University Journal of Natural Sciences》2021年第2期174-182,共9页武汉大学学报（自然科学英文版）

基　　金：Supported by the Guangzhou Innovation Leading Team Program (201909010008)。

摘　　要：The well-known CCSDS(consultative committee for space data systems) LDPC(low density parity check) code for near-earth applications is discussed and used for a case study of Mc Eliece system. First, a data error is picked out with the CCSDS LDPC code. The problem with its generator matrix is illustrated and overcome by a shortened code with some middle code bits deleted. In correspondence, its parity check matrix is also revised with the new quasi-cyclic(QC)-LDPC code. Second, a fast decoding scheme for general QC-LDPC codes is proposed based on flipping bits and fetching words. Besides, a lightweight CCSDS LDPC code based Mc Eliece system can be set up with such codes. The repaired CCSDS LDPC code is supposed to be still useful for communications and storages, and the normalized decoding algorithm is also efficient for general QC-LDPC codes.

关 键 词：LDPC(low density parity check)code CCSDS(consultative committee for space data systems) bit-flipping Mc Eliece system 

分 类 号：TN919[电子电信—通信与信息系统]