Although this site was up over 25 years it now soon will be shut down due to administrative reasons.
It will be further available on my new home page www.yvesedel.de

The check matrix of a [20,10,9]₈. A double circulant code.

10000000001010237222
01000000000102372221
00100000001023722210
00010000000237222101
00001000002372221010
00000100003722210102
00000010007222101023
00000001002221010237
00000000102210102372
00000000012101023722

The prime polynomial used to generate GF(8) is: X³+X²+1. The element f=aX²+bX+c, a,b,c in {0,1}, is written as the number a*4+b*2+c.

The weight distribution (formal selfdual):

A'₀= 1, A'₉= 7210, A'₁₀= 52955, A'₁₁= 307300, A'₁₂= 1597785, A'₁₃= 7033740, A'₁₄= 24483270, A'₁₅= 68539968, A'₁₆= 149888445, A'₁₇= 247118970, A'₁₈= 288045695, A'₁₉= 212359980, A'₂₀= 74306505.

| Some codes | home |