大奖娱乐官网88pt88-自己的创造的价值未必很大

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大奖娱乐官网88pt88-自己的创造的价值未必很大

发布者:文明办发布时间:2019-07-11浏览次数:43


主讲人:张耀祖 台湾义守大学


时间:2019年7月15日14:00


地点:3号楼332


举办单位:数理学院


内容介绍:Quadratic residues (QR) codes, introduced by Prange in 1958, are cyclic codes  with code rates not less than 1/2 and generally have large minimum distances, so  that most of the known QR codes are the best-known codes. Both the famous  Hamming code of length 7 and the Golay codes are QR codes. However, it is  difficult to decode QR codes, and except for those of low lengths, the decoders  for QR codes appeared quite late. The first algebraic decoder of Golay code of  length 23 was proposed by Elia in 1987. From 1990, Reed et al. published a  series of papers about algebraic decoding of QR codes of lengths 31, 41, 47, and  73. After that, the coding group of I-Shou University continued the QR decoding  study and developed decoders of lengths 71, 79, 89, 97, 103, and 113. Hence, all  binary QR codes of lengths not exceed 113 are decoded. In this presentation, we  give a brief review of decoding QR codes. It also includes the most recent works  done by I-Shou coding group which improve the decoding processes for the  practical hardware implementation.