Best Known (242−38, 242, s)-Nets in Base 2
(242−38, 242, 520)-Net over F2 — Constructive and digital
Digital (204, 242, 520)-net over F2, using
- 22 times duplication [i] based on digital (202, 240, 520)-net over F2, using
- t-expansion [i] based on digital (201, 240, 520)-net over F2, using
- trace code for nets [i] based on digital (9, 48, 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, 48, 104)-net over F32, using
- t-expansion [i] based on digital (201, 240, 520)-net over F2, using
(242−38, 242, 1562)-Net over F2 — Digital
Digital (204, 242, 1562)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2242, 1562, F2, 2, 38) (dual of [(1562, 2), 2882, 39]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2242, 2072, F2, 2, 38) (dual of [(2072, 2), 3902, 39]-NRT-code), using
- 21 times duplication [i] based on linear OOA(2241, 2072, F2, 2, 38) (dual of [(2072, 2), 3903, 39]-NRT-code), using
- OOA 2-folding [i] based on linear OA(2241, 4144, F2, 38) (dual of [4144, 3903, 39]-code), using
- strength reduction [i] based on linear OA(2241, 4144, F2, 39) (dual of [4144, 3903, 40]-code), using
- construction X applied to Ce(38) ⊂ Ce(32) [i] based on
- linear OA(2229, 4096, F2, 39) (dual of [4096, 3867, 40]-code), using an extension Ce(38) of the primitive narrow-sense BCH-code C(I) with length 4095 = 212−1, defining interval I = [1,38], and designed minimum distance d ≥ |I|+1 = 39 [i]
- linear OA(2193, 4096, F2, 33) (dual of [4096, 3903, 34]-code), using an extension Ce(32) of the primitive narrow-sense BCH-code C(I) with length 4095 = 212−1, defining interval I = [1,32], and designed minimum distance d ≥ |I|+1 = 33 [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(38) ⊂ Ce(32) [i] based on
- strength reduction [i] based on linear OA(2241, 4144, F2, 39) (dual of [4144, 3903, 40]-code), using
- OOA 2-folding [i] based on linear OA(2241, 4144, F2, 38) (dual of [4144, 3903, 39]-code), using
- 21 times duplication [i] based on linear OOA(2241, 2072, F2, 2, 38) (dual of [(2072, 2), 3903, 39]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2242, 2072, F2, 2, 38) (dual of [(2072, 2), 3902, 39]-NRT-code), using
(242−38, 242, 54095)-Net in Base 2 — Upper bound on s
There is no (204, 242, 54096)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 7 068254 779624 596013 246450 235456 815676 803093 905321 842914 739740 046660 691956 > 2242 [i]