Recently, Type II codes over F4 have been introduced as Euclidean self-dual codes with the property that all Lee weights are divisible by four. In this paper, a number of properties of Type II codes are presented. We construct several extremal Type II codes and a number of extremal Type I codes. It is also shown that there are seven Type II codes of length 12, up to permutation equivalence.
- Euclidean self-dual codes over F
- Type II codes
ASJC Scopus subject areas
- Information Systems
- Computer Science Applications
- Library and Information Sciences