Best Known (191−20, 191, s)-Nets in Base 2
(191−20, 191, 52430)-Net over F2 — Constructive and digital
Digital (171, 191, 52430)-net over F2, using
- net defined by OOA [i] based on linear OOA(2191, 52430, F2, 20, 20) (dual of [(52430, 20), 1048409, 21]-NRT-code), using
- OA 10-folding and stacking [i] based on linear OA(2191, 524300, F2, 20) (dual of [524300, 524109, 21]-code), using
- discarding factors / shortening the dual code based on linear OA(2191, 524307, F2, 20) (dual of [524307, 524116, 21]-code), using
- 1 times truncation [i] based on linear OA(2192, 524308, F2, 21) (dual of [524308, 524116, 22]-code), using
- construction X applied to Ce(20) ⊂ Ce(18) [i] based on
- linear OA(2191, 524288, F2, 21) (dual of [524288, 524097, 22]-code), using an extension Ce(20) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,20], and designed minimum distance d ≥ |I|+1 = 21 [i]
- linear OA(2172, 524288, F2, 19) (dual of [524288, 524116, 20]-code), using an extension Ce(18) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,18], and designed minimum distance d ≥ |I|+1 = 19 [i]
- linear OA(21, 20, F2, 1) (dual of [20, 19, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(21, s, F2, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(20) ⊂ Ce(18) [i] based on
- 1 times truncation [i] based on linear OA(2192, 524308, F2, 21) (dual of [524308, 524116, 22]-code), using
- discarding factors / shortening the dual code based on linear OA(2191, 524307, F2, 20) (dual of [524307, 524116, 21]-code), using
- OA 10-folding and stacking [i] based on linear OA(2191, 524300, F2, 20) (dual of [524300, 524109, 21]-code), using
(191−20, 191, 87384)-Net over F2 — Digital
Digital (171, 191, 87384)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2191, 87384, F2, 6, 20) (dual of [(87384, 6), 524113, 21]-NRT-code), using
- OOA 6-folding [i] based on linear OA(2191, 524304, F2, 20) (dual of [524304, 524113, 21]-code), using
- discarding factors / shortening the dual code based on linear OA(2191, 524307, F2, 20) (dual of [524307, 524116, 21]-code), using
- 1 times truncation [i] based on linear OA(2192, 524308, F2, 21) (dual of [524308, 524116, 22]-code), using
- construction X applied to Ce(20) ⊂ Ce(18) [i] based on
- linear OA(2191, 524288, F2, 21) (dual of [524288, 524097, 22]-code), using an extension Ce(20) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,20], and designed minimum distance d ≥ |I|+1 = 21 [i]
- linear OA(2172, 524288, F2, 19) (dual of [524288, 524116, 20]-code), using an extension Ce(18) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,18], and designed minimum distance d ≥ |I|+1 = 19 [i]
- linear OA(21, 20, F2, 1) (dual of [20, 19, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(21, s, F2, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(20) ⊂ Ce(18) [i] based on
- 1 times truncation [i] based on linear OA(2192, 524308, F2, 21) (dual of [524308, 524116, 22]-code), using
- discarding factors / shortening the dual code based on linear OA(2191, 524307, F2, 20) (dual of [524307, 524116, 21]-code), using
- OOA 6-folding [i] based on linear OA(2191, 524304, F2, 20) (dual of [524304, 524113, 21]-code), using
(191−20, 191, 2544759)-Net in Base 2 — Upper bound on s
There is no (171, 191, 2544760)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 3138 556922 465943 609316 539564 334877 737333 664516 888185 912158 > 2191 [i]