1. 北京理工大学信息科学技术学院,北京,100081
2. 公安部信息安全等级保护评估中心,北京,100036
3. 北京理工大学信息科学技术学院北京,100081
4. 公安部信息安全等级保护评估中心北京,100036
纸质出版:2008
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谢朝海, 陶 然, 王 越, 等. 原-对偶规约基与连续最小元[J]. 电子学报, 2008,36(6):1124-1129.
XIE Chao-hai, TAO Ran, WANG Yue, et al. Primal-Dual Bases and Successive Minima[J]. Acta Electronica Sinica, 2008, 36(6): 1124-1129.
最近Koy提出一种质量优于LLL规约基的原-对偶规约基
但没有给出该规约基与最小元比值因子的上界和下界.本文首先分析了原-对偶规约基的性质
然后给出并证明了原-对偶规约基与连续最小元比值因子的上界和下界
最后用原-对偶规约基改进Babai的近似CVP算法——舍入算法
提高了其近似因子.
Recently Koy proposed primal-dual bases which have better quality than LLL-reduced bases in high-dimensional lattice
but his efforts did not take into account the low and upper bounds for the ratios of primal-dual bases to successive minima.In this paper some useful properties of Koy’s primal-dual bases are analyzed and then the low and upper bounds for the ratios of primal-dual bases to successive minima are introduced and proved.At the end
the Round-off algorithm for the approximate-CVP is improved using primal-dual bases and its result has a better approximation factor than L.Babai’s.
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