摘 要:提出了一种构造偶周期三值自相关四元序列偶的新方法。构造得到的三值自相关四元序列偶具有良好的自相关特性。首先利用二阶分圆类构造出两个周期为 2f 的二元序列,然后对两个二元序列采用逆 Gray 映射,进而得到一个周期为 2f 的三值自相关四元序列偶。并对所得到的三值四元序列偶进行了重点研究,当 f ≥ 4 时该四元序列偶具有良好的自相关特性,自相关函数分布与 Fv 的二阶分圆类(v=2f+1,f ≥ 4)中的奇偶性有关,当 f 为奇数时副峰值为 {-4,0},当 f 为偶数时副峰值为 {-2,2}。
关键词:三值四元序列偶;二阶分圆类;逆 Gray 映射;自相关函数;奇偶性
DOI:10.19850/j.cnki.2096-4706.2021.06.016
基金项目:河北化工医药职业技术学院院级 项目(YZ201925)
中图分类号:TN911.1 文献标识码:A 文章编号:2096-4706(2021)06-0062-04
A New Construction Method of Even Period Quaternary Sequence Pair with Three-level
SHI Yan
(Hebei Chemical & Pharmaceutical College,Shijiazhuang 050026,China)
Abstract:A new method for constructing even period quaternary sequence pair with three-level autocorrelation is proposed. The constructed quaternary sequence pair with three-level autocorrelation have good autocorrelation characteristics. First,two binary sequences with period of 2f are proposed by second order cyclotomic class,then a new qu-aternary pair with three-level autocorrelation with period 2f is obtained from those two binary sequences by using the reverse Gray mapping. The quaternary sequence pair with three-level is studied,when f ≥ 4 the quaternary sequence pair has good properties of autocorrelation. The distribution of autocorrela-tion function is related to the parity in the second order cyclotomic class of Fv(v=2f+1,f ≥ 4). When f is odd,the sub peak is {-4,0},and {-2,2} when f is even.
Keywords:quaternary sequence pair with three-level;second order cyclotomic class;reverse Gray mapping;autocorrelation function;parity
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作者简介:石妍(1989—)女,汉族,河北石家庄人,中级讲 师,硕士,研究方向:扩频通信及信道编码。