Best Known (68−8, 68, s)-Nets in Base 4
(68−8, 68, 1048582)-Net over F4 — Constructive and digital
Digital (60, 68, 1048582)-net over F4, using
- net defined by OOA [i] based on linear OOA(468, 1048582, F4, 8, 8) (dual of [(1048582, 8), 8388588, 9]-NRT-code), using
- OA 4-folding and stacking [i] based on linear OA(468, 4194328, F4, 8) (dual of [4194328, 4194260, 9]-code), using
- construction X4 applied to Ce(8) ⊂ Ce(5) [i] based on
- linear OA(467, 4194304, F4, 9) (dual of [4194304, 4194237, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 4194303 = 411−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(445, 4194304, F4, 6) (dual of [4194304, 4194259, 7]-code), using an extension Ce(5) of the primitive narrow-sense BCH-code C(I) with length 4194303 = 411−1, defining interval I = [1,5], and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(423, 24, F4, 23) (dual of [24, 1, 24]-code or 24-arc in PG(22,4)), using
- dual of repetition code with length 24 [i]
- linear OA(41, 24, F4, 1) (dual of [24, 23, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(41, s, F4, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X4 applied to Ce(8) ⊂ Ce(5) [i] based on
- OA 4-folding and stacking [i] based on linear OA(468, 4194328, F4, 8) (dual of [4194328, 4194260, 9]-code), using
(68−8, 68, 4194328)-Net over F4 — Digital
Digital (60, 68, 4194328)-net over F4, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(468, 4194328, F4, 8) (dual of [4194328, 4194260, 9]-code), using
- construction X4 applied to Ce(8) ⊂ Ce(5) [i] based on
- linear OA(467, 4194304, F4, 9) (dual of [4194304, 4194237, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 4194303 = 411−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(445, 4194304, F4, 6) (dual of [4194304, 4194259, 7]-code), using an extension Ce(5) of the primitive narrow-sense BCH-code C(I) with length 4194303 = 411−1, defining interval I = [1,5], and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(423, 24, F4, 23) (dual of [24, 1, 24]-code or 24-arc in PG(22,4)), using
- dual of repetition code with length 24 [i]
- linear OA(41, 24, F4, 1) (dual of [24, 23, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(41, s, F4, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X4 applied to Ce(8) ⊂ Ce(5) [i] based on
(68−8, 68, large)-Net in Base 4 — Upper bound on s
There is no (60, 68, large)-net in base 4, because
- 6 times m-reduction [i] would yield (60, 62, large)-net in base 4, but