Best Known (21, 21+8, s)-Nets in Base 16
(21, 21+8, 16385)-Net over F16 — Constructive and digital
Digital (21, 29, 16385)-net over F16, using
- net defined by OOA [i] based on linear OOA(1629, 16385, F16, 8, 8) (dual of [(16385, 8), 131051, 9]-NRT-code), using
- OA 4-folding and stacking [i] based on linear OA(1629, 65540, F16, 8) (dual of [65540, 65511, 9]-code), using
- construction X applied to Ce(7) ⊂ Ce(6) [i] based on
- linear OA(1629, 65536, F16, 8) (dual of [65536, 65507, 9]-code), using an extension Ce(7) of the primitive narrow-sense BCH-code C(I) with length 65535 = 164−1, defining interval I = [1,7], and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(1625, 65536, F16, 7) (dual of [65536, 65511, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 65535 = 164−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(160, 4, F16, 0) (dual of [4, 4, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(160, s, F16, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(7) ⊂ Ce(6) [i] based on
- OA 4-folding and stacking [i] based on linear OA(1629, 65540, F16, 8) (dual of [65540, 65511, 9]-code), using
(21, 21+8, 65540)-Net over F16 — Digital
Digital (21, 29, 65540)-net over F16, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(1629, 65540, F16, 8) (dual of [65540, 65511, 9]-code), using
- construction X applied to Ce(7) ⊂ Ce(6) [i] based on
- linear OA(1629, 65536, F16, 8) (dual of [65536, 65507, 9]-code), using an extension Ce(7) of the primitive narrow-sense BCH-code C(I) with length 65535 = 164−1, defining interval I = [1,7], and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(1625, 65536, F16, 7) (dual of [65536, 65511, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 65535 = 164−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(160, 4, F16, 0) (dual of [4, 4, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(160, s, F16, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(7) ⊂ Ce(6) [i] based on
(21, 21+8, large)-Net in Base 16 — Upper bound on s
There is no (21, 29, large)-net in base 16, because
- 6 times m-reduction [i] would yield (21, 23, large)-net in base 16, but