All Z(4) codes of Type II and length 16 are known

[摘要] We show that there are 133 inequivalent Type II codes over Z(4) of length 16. We give the number of each type 4'.2', where 2i + j = 16, a generator matrix for each code. the order of its automorphism group. and its minimum Lee weight. A (partial) symmetrized weight enumerator of each code is given. The highest minimum Lee weight amongst these codes is 8, and there are 5 inequivalent codes attaining this highest Lee weight. A new computer algorithm to determine the automorphism group of a Z(4) code was used. (C) 1997 Academic Press.

[发布日期] 1997-04-01