On the Construction of Skew Quasi-Cyclic Codes

Autor:	Abualrub, Taher, Ghrayeb, Ali, Aydin, Nuh, Siap, Irfan
Rok vydání:	2008
Předmět:	Computer Science - Information Theory Computer Science - Discrete Mathematics Mathematics - Rings and Algebras
Druh dokumentu:	Working Paper
Popis:	In this paper we study a special type of quasi-cyclic (QC) codes called skew QC codes. This set of codes is constructed using a non-commutative ring called the skew polynomial rings $F[x;\theta ]$. After a brief description of the skew polynomial ring $F[x;\theta ]$ it is shown that skew QC codes are left submodules of the ring $R_{s}^{l}=(F[x;\theta ]/(x^{s}-1))^{l}.$ The notions of generator and parity-check polynomials are given. We also introduce the notion of similar polynomials in the ring $F[x;\theta ]$ and show that parity-check polynomials for skew QC codes are unique up to similarity. Our search results lead to the construction of several new codes with Hamming distances exceeding the Hamming distances of the previously best known linear codes with comparable parameters. Comment: 12 pages. submitted
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0809.2315 Zobrazit plný text záznamu View this record from Arxiv