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一种Z_4线性码四相扩频序列的分析
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作者 蔡国权 高世海 宋国文 《信息工程大学学报》 2001年第1期39-42,共4页
本文首先分析了Z4 序列的平衡特性 ;然后详细讨论了Z4码四相扩频序列的广义奇相关的分布 ;并就相关峰值和相关均方值等相关特性 ,通过计算机仿真 ,将Z4码四相扩频序列与其它四相扩频序列进行比较。结果表明 ,Z4码四相扩频序列具有优良... 本文首先分析了Z4 序列的平衡特性 ;然后详细讨论了Z4码四相扩频序列的广义奇相关的分布 ;并就相关峰值和相关均方值等相关特性 ,通过计算机仿真 ,将Z4码四相扩频序列与其它四相扩频序列进行比较。结果表明 ,Z4码四相扩频序列具有优良的相关特性 ,可作为DS/CDMA四相扩频序列的侯选。 展开更多
关键词 z4码四相矿频序列 广义奇相关 平衡特性 多址干扰 DS/COMA 扩频技术 相关特性
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A DECODING ALGORITHM FOR GENERAL ZZ_4-LINEAR CODES
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作者 CUIJie 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2004年第1期16-22,共7页
In this correspondence, a decoding algorithm for the general Z_4-linear codesis given and the complexity of the decoding algorithm is estimated.
关键词 z_4-linear code test set voronoi region
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Weight distribution of Preparata codes over Z_4 and the construction of 3-designs
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作者 LI WeiXia SHEN Hao 《Science China Mathematics》 SCIE 2014年第6期1155-1162,共8页
In this paper,we calculate the number of the codewords(with Hamming weight 7)of each type in the Preparata codes over Z4,then give the parameter sets of 3-designs constructed from the supports of the codewords of each... In this paper,we calculate the number of the codewords(with Hamming weight 7)of each type in the Preparata codes over Z4,then give the parameter sets of 3-designs constructed from the supports of the codewords of each type.Moreover,we prove that the first two families of 3-designs are simple and the third family of the 3-designs has repeated blocks. 展开更多
关键词 T-DESIGNS weight distribution Preparata codes over z4
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An Analogue of the Z4-Goethals Code in Non-Primitive Length
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作者 ALAHMADI Adel ALHAZMI Husain +4 位作者 ALI Shakir HELLESETH Tor HIJAZI Rola LI Chunlei SOLE Patrick 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2017年第4期950-966,共17页
This paper constructs a cyclic Z_4-code with a parity-check matrix similar to that of Goethals code but in length 2~m+ 1, for all m ≥ 4. This code is a subcode of the lifted Zetterberg code for m even. Its minimum Le... This paper constructs a cyclic Z_4-code with a parity-check matrix similar to that of Goethals code but in length 2~m+ 1, for all m ≥ 4. This code is a subcode of the lifted Zetterberg code for m even. Its minimum Lee weight is shown to be at least 10, in general, and exactly 12 in lengths 33, 65. The authors give an algebraic decoding algorithm which corrects five errors in these lengths for m = 5, 6 and four errors for m > 6. 展开更多
关键词 Cyclic codes Goethals code z4-codes.
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一类四元码的二元像为线性码的判断
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作者 梁亚娜 王宝珍 《喀什师范学院学报》 2008年第6期13-15,共3页
针对生成矩阵为G0的四元码的二元像是否为线性码进行了研究,并给出相应的充要条件及其低复杂度的判断算法.
关键词 四元码 二元像 z4线性码 算法
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