Trace Codes with Few Weights over $\mathbb{F}_p+u\mathbb{F}_p$

Abstract

We construct an infinite family of two-Lee-weight and three-Lee-weight codes over the chain ring $\mathbb{F}_p+u\mathbb{F}_p.$ They have the algebraic structure of abelian codes. Their Lee weight distribution is computed by using Gauss sums. Then by using a linear Gray map, we obtain an infinite family of abelian codes with few weights over $\mathbb{F}_p$. In particular, we obtain an infinite family of two-weight codes which meets the Griesmer bound with equality. Finally, an application to secret sharing schemes is given.

12 pages, submitted on 27 October, 2016. arXiv admin note: text overlap with arXiv:1612.00126, arXiv:1612.00118