Best Known (220, 254, s)-Nets in Base 4
(220, 254, 61682)-Net over F4 — Constructive and digital
Digital (220, 254, 61682)-net over F4, using
- net defined by OOA [i] based on linear OOA(4254, 61682, F4, 34, 34) (dual of [(61682, 34), 2096934, 35]-NRT-code), using
- OA 17-folding and stacking [i] based on linear OA(4254, 1048594, F4, 34) (dual of [1048594, 1048340, 35]-code), using
- discarding factors / shortening the dual code based on linear OA(4254, 1048597, F4, 34) (dual of [1048597, 1048343, 35]-code), using
- construction X applied to Ce(33) ⊂ Ce(30) [i] based on
- linear OA(4251, 1048576, F4, 34) (dual of [1048576, 1048325, 35]-code), using an extension Ce(33) of the primitive narrow-sense BCH-code C(I) with length 1048575 = 410−1, defining interval I = [1,33], and designed minimum distance d ≥ |I|+1 = 34 [i]
- linear OA(4231, 1048576, F4, 31) (dual of [1048576, 1048345, 32]-code), using an extension Ce(30) of the primitive narrow-sense BCH-code C(I) with length 1048575 = 410−1, defining interval I = [1,30], and designed minimum distance d ≥ |I|+1 = 31 [i]
- linear OA(43, 21, F4, 2) (dual of [21, 18, 3]-code), using
- Hamming code H(3,4) [i]
- construction X applied to Ce(33) ⊂ Ce(30) [i] based on
- discarding factors / shortening the dual code based on linear OA(4254, 1048597, F4, 34) (dual of [1048597, 1048343, 35]-code), using
- OA 17-folding and stacking [i] based on linear OA(4254, 1048594, F4, 34) (dual of [1048594, 1048340, 35]-code), using
(220, 254, 349532)-Net over F4 — Digital
Digital (220, 254, 349532)-net over F4, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(4254, 349532, F4, 3, 34) (dual of [(349532, 3), 1048342, 35]-NRT-code), using
- OOA 3-folding [i] based on linear OA(4254, 1048596, F4, 34) (dual of [1048596, 1048342, 35]-code), using
- discarding factors / shortening the dual code based on linear OA(4254, 1048597, F4, 34) (dual of [1048597, 1048343, 35]-code), using
- construction X applied to Ce(33) ⊂ Ce(30) [i] based on
- linear OA(4251, 1048576, F4, 34) (dual of [1048576, 1048325, 35]-code), using an extension Ce(33) of the primitive narrow-sense BCH-code C(I) with length 1048575 = 410−1, defining interval I = [1,33], and designed minimum distance d ≥ |I|+1 = 34 [i]
- linear OA(4231, 1048576, F4, 31) (dual of [1048576, 1048345, 32]-code), using an extension Ce(30) of the primitive narrow-sense BCH-code C(I) with length 1048575 = 410−1, defining interval I = [1,30], and designed minimum distance d ≥ |I|+1 = 31 [i]
- linear OA(43, 21, F4, 2) (dual of [21, 18, 3]-code), using
- Hamming code H(3,4) [i]
- construction X applied to Ce(33) ⊂ Ce(30) [i] based on
- discarding factors / shortening the dual code based on linear OA(4254, 1048597, F4, 34) (dual of [1048597, 1048343, 35]-code), using
- OOA 3-folding [i] based on linear OA(4254, 1048596, F4, 34) (dual of [1048596, 1048342, 35]-code), using
(220, 254, large)-Net in Base 4 — Upper bound on s
There is no (220, 254, large)-net in base 4, because
- 32 times m-reduction [i] would yield (220, 222, large)-net in base 4, but