60 research outputs found
The coset weight distributions of certain BCH codes and a family of curves
We study the distribution of the number of rational points in a family of
curves over a finite field of characteristic 2. This distribution determines
the coset weight distribution of a certain BCH code.Comment: Plain Tex, 15 pages; some numerical data adde
On the Automorphism Groups of some AG-Codes Based on Ca;b Curves
*Partially supported by NATO.We study Ca,b curves and their applications to coding theory.
Recently, Joyner and Ksir have suggested a decoding algorithm based on
the automorphisms of the code. We show how Ca;b curves can be used to
construct MDS codes and focus on some Ca;b curves with extra automorphisms,
namely y^3 = x^4 + 1, y^3 = x^4 - x, y^3 - y = x^4. The automorphism
groups of such codes are determined in most characteristics
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