Best Known (218, 218+38, s)-Nets in Base 2
(218, 218+38, 624)-Net over F2 — Constructive and digital
Digital (218, 256, 624)-net over F2, using
- 2 times m-reduction [i] based on digital (218, 258, 624)-net over F2, using
- trace code for nets [i] based on digital (3, 43, 104)-net over F64, using
- net from sequence [i] based on digital (3, 103)-sequence over F64, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F64 with g(F) = 3 and N(F) ≥ 104, using
- net from sequence [i] based on digital (3, 103)-sequence over F64, using
- trace code for nets [i] based on digital (3, 43, 104)-net over F64, using
(218, 218+38, 2303)-Net over F2 — Digital
Digital (218, 256, 2303)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2256, 2303, F2, 3, 38) (dual of [(2303, 3), 6653, 39]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2256, 2742, F2, 3, 38) (dual of [(2742, 3), 7970, 39]-NRT-code), using
- strength reduction [i] based on linear OOA(2256, 2742, F2, 3, 39) (dual of [(2742, 3), 7970, 40]-NRT-code), using
- OOA 3-folding [i] based on linear OA(2256, 8226, F2, 39) (dual of [8226, 7970, 40]-code), using
- 2 times code embedding in larger space [i] based on linear OA(2254, 8224, F2, 39) (dual of [8224, 7970, 40]-code), using
- construction X applied to Ce(38) ⊂ Ce(34) [i] based on
- linear OA(2248, 8192, F2, 39) (dual of [8192, 7944, 40]-code), using an extension Ce(38) of the primitive narrow-sense BCH-code C(I) with length 8191 = 213−1, defining interval I = [1,38], and designed minimum distance d ≥ |I|+1 = 39 [i]
- linear OA(2222, 8192, F2, 35) (dual of [8192, 7970, 36]-code), using an extension Ce(34) of the primitive narrow-sense BCH-code C(I) with length 8191 = 213−1, defining interval I = [1,34], and designed minimum distance d ≥ |I|+1 = 35 [i]
- linear OA(26, 32, F2, 3) (dual of [32, 26, 4]-code or 32-cap in PG(5,2)), using
- construction X applied to Ce(38) ⊂ Ce(34) [i] based on
- 2 times code embedding in larger space [i] based on linear OA(2254, 8224, F2, 39) (dual of [8224, 7970, 40]-code), using
- OOA 3-folding [i] based on linear OA(2256, 8226, F2, 39) (dual of [8226, 7970, 40]-code), using
- strength reduction [i] based on linear OOA(2256, 2742, F2, 3, 39) (dual of [(2742, 3), 7970, 40]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2256, 2742, F2, 3, 38) (dual of [(2742, 3), 7970, 39]-NRT-code), using
(218, 218+38, 90170)-Net in Base 2 — Upper bound on s
There is no (218, 256, 90171)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 115807 783216 907464 189607 164268 088079 259443 145024 423816 621531 362565 718912 636566 > 2256 [i]