Improved estimates for the minimum distance of weighted degree Z/sub 4/ trace codes
Tor Helleseth, P. Vijay Kumar, Óscar Moreno, A.G. Shanbhag · 2002
A recently derived upper bound for Weil-type exponential sums over Galois rings leads directly to an estimate for the minimum Lee distance of Z/sub 4/-linear trace codes. In this paper, an improved minimum distance estimate is presented. The improved estimate is tight for the Kerdock code as well as for the Delsarte-Goethals' codes.