Gauss periods and codebooks from generalized cyclotomic sets of order four

被引:19
|
作者
Hu, Liqin [1 ]
Yue, Qin [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Dept Math, Nanjing 210016, Peoples R China
关键词
Gauss period; Codebook; Generalized cyclotomy; COMPLEX CODEBOOKS; DIFFERENCE SETS;
D O I
10.1007/s10623-012-9648-8
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Let p, q be distinct primes with gcd(p - 1, q - 1) = 4. Let D (0), D (1), D (2), D (3) be Whiteman's generalized cyclotomic classes, satisfying the multiplicative group . In this paper, we give formulas of Gauss periods: and , where is a pqth primitive root of unity. As an application, we get the maximum cross-correlation amplitudes of three codebooks from generalized cyclotomic sets of order four and supply conditions on p and q such that they nearly meet the Welch bound.
引用
收藏
页码:233 / 246
页数:14
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