Best Known (252−40, 252, s)-Nets in Base 2
(252−40, 252, 520)-Net over F2 — Constructive and digital
Digital (212, 252, 520)-net over F2, using
- 22 times duplication [i] based on digital (210, 250, 520)-net over F2, using
- t-expansion [i] based on digital (209, 250, 520)-net over F2, using
- trace code for nets [i] based on digital (9, 50, 104)-net over F32, using
- net from sequence [i] based on digital (9, 103)-sequence over F32, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F32 with g(F) = 9 and N(F) ≥ 104, using
- net from sequence [i] based on digital (9, 103)-sequence over F32, using
- trace code for nets [i] based on digital (9, 50, 104)-net over F32, using
- t-expansion [i] based on digital (209, 250, 520)-net over F2, using
(252−40, 252, 1531)-Net over F2 — Digital
Digital (212, 252, 1531)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2252, 1531, F2, 2, 40) (dual of [(1531, 2), 2810, 41]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2252, 2071, F2, 2, 40) (dual of [(2071, 2), 3890, 41]-NRT-code), using
- OOA 2-folding [i] based on linear OA(2252, 4142, F2, 40) (dual of [4142, 3890, 41]-code), using
- discarding factors / shortening the dual code based on linear OA(2252, 4143, F2, 40) (dual of [4143, 3891, 41]-code), using
- 1 times truncation [i] based on linear OA(2253, 4144, F2, 41) (dual of [4144, 3891, 42]-code), using
- construction X applied to Ce(40) ⊂ Ce(34) [i] based on
- linear OA(2241, 4096, F2, 41) (dual of [4096, 3855, 42]-code), using an extension Ce(40) of the primitive narrow-sense BCH-code C(I) with length 4095 = 212−1, defining interval I = [1,40], and designed minimum distance d ≥ |I|+1 = 41 [i]
- linear OA(2205, 4096, F2, 35) (dual of [4096, 3891, 36]-code), using an extension Ce(34) of the primitive narrow-sense BCH-code C(I) with length 4095 = 212−1, defining interval I = [1,34], and designed minimum distance d ≥ |I|+1 = 35 [i]
- linear OA(212, 48, F2, 5) (dual of [48, 36, 6]-code), using
- adding a parity check bit [i] based on linear OA(211, 47, F2, 4) (dual of [47, 36, 5]-code), using
- extracting embedded orthogonal array [i] based on digital (7, 11, 47)-net over F2, using
- adding a parity check bit [i] based on linear OA(211, 47, F2, 4) (dual of [47, 36, 5]-code), using
- construction X applied to Ce(40) ⊂ Ce(34) [i] based on
- 1 times truncation [i] based on linear OA(2253, 4144, F2, 41) (dual of [4144, 3891, 42]-code), using
- discarding factors / shortening the dual code based on linear OA(2252, 4143, F2, 40) (dual of [4143, 3891, 41]-code), using
- OOA 2-folding [i] based on linear OA(2252, 4142, F2, 40) (dual of [4142, 3890, 41]-code), using
- discarding factors / shortening the dual code based on linear OOA(2252, 2071, F2, 2, 40) (dual of [(2071, 2), 3890, 41]-NRT-code), using
(252−40, 252, 51527)-Net in Base 2 — Upper bound on s
There is no (212, 252, 51528)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 7239 542074 832077 862922 563753 050914 364852 280359 000987 865680 654608 882956 263316 > 2252 [i]