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A class of linear codes with their complete weight enumerators over finite fields
Cryptography and Communications ( IF 1.4 ) Pub Date : 2021-06-10 , DOI: 10.1007/s12095-021-00496-w
Pavan Kumar , Noor Mohammad Khan

For any positive integer m > 2 and an odd prime p, let \(\mathbb {F}_{p^{m}}\) be the finite field with pm elements and let \( \text {Tr}^{m}_{e}\) be the trace function from \(\mathbb {F}_{p^{m}}\) onto \(\mathbb {F}_{p^{e}}\) for a divisor e of m. In this paper, for the defining set \(D=\{x\in \mathbb {F}_{p^{m}}:\text {Tr}^{m}_{e}(x)=1\text { and } \text {Tr}^{m}_{e}(x^{2})=0\}=\{d_{1}, d_{2}, \ldots , d_{n}\}\)(say), we define a pe-ary linear code \(\mathcal {C}_{D}\) by

$$ \mathcal{C}_{D}=\{\textbf{c}_{a} =\left( \text{Tr}^{m}_{e}(ad_{1}), \text{Tr}^{m}_{e}(ad_{2}),\ldots,\text{Tr}^{m}_{e}(ad_{n})\right) : a\in \mathbb{F}_{p^{m}}\}. $$

Then we determine the complete weight enumerator and weight distribution of the linear code \(\mathcal {C}_{D}\). The presented code is optimal with respect to the Griesmer bound provided that \(\frac {m}{e}=3\). In fact, it is MDS when \(\frac {m}{e}=3\). This paper gives the results of S. Yang, X. Kong and C. Tang (Finite Fields Appl. 48 (2017)) if we take e = 1. In addition to the generalization of the results of Yang et al., we study the dual code \(\mathcal {C}_{D}^{\perp }\) of the code \(\mathcal {C}_{D}\) as well as find some optimal constant composition codes.



中文翻译:

一类在有限域上具有完全权重枚举器的线性码

对于任何正整数m > 2 和奇素数p,令\(\mathbb {F}_{p^{m}}\)是具有p m 个元素的有限域,并令\( \text {Tr}^{米} _ {E} \)是从跟踪函数\(\ mathbb {F} _ {p ^ {米}} \)\(\ mathbb {F} _ {p ^ {E}} \)用于除数Ë。在本文中,对于定义集\(D=\{x\in \mathbb {F}_{p^{m}}:\text {Tr}^{m}_{e}(x)=1\文本 { 和 } \text {Tr}^{m}_{e}(x^{2})=0\}=\{d_{1}, d_{2}, \ldots , d_{n}\} \) (比方说),我们定义一个p ë进制线性码\(\ mathcal {C} _ {d} \)

$$ \mathcal{C}_{D}=\{\textbf{c}_{a} =\left( \text{Tr}^{m}_{e}(ad_{1}), \text{ Tr}^{m}_{e}(ad_{2}),\ldots,\text{Tr}^{m}_{e}(ad_{n})\right) : a\in \mathbb{F }_{p^{m}}\}。$$

然后我们确定线性代码\(\mathcal {C}_{D}\)的完整权重枚举器和权重分布。如果\(\frac {m}{e}=3\) ,所提供的代码对于 Griesmer 边界是最佳的。实际上,当\(\frac {m}{e}=3\)时就是 MDS 。本文给出了 S. Yang、X. Kong 和 C. Tang (Finite Fields Appl. 48 (2017)) 的结果,如果我们取e = 1。除了对 Yang 等人的结果进行推广,我们研究双码\(\ mathcal {C} _ {d} ^ {\ PERP} \)的代码\(\ mathcal {C} _ {d} \)以及找到一些最佳恒定的组成码。

更新日期:2021-06-10
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