# Journal of the Ramanujan Mathematical Society

Volume 33, Issue 4, December 2018 pp. 379–397.

The weight distribution of a class of constacyclic codes

**Authors**:
Amita Sahni and Poonam Trama Sehgal

**Author institution:**Centre for Advanced Study in Mathematics, Panjab University, Chandigarh 160 014, India

**Summary: **
Let Fq be a finite field with q elements. For a
non zero element λ in Fq, we consider
λ-constacyclic codes of length N over Fq,
where characteristic of Fq does not divide N. We
find the necessary and sufficient conditions when a
λ-constacyclic codes of length N over Fq
has generator polynomial of the form (xn - β), β in
Fq. We explicitly determine the weight distribution
of such λ-constacyclic codes directly from their generator
polynomials.

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