Best Known (76, 76+18, s)-Nets in Base 4
(76, 76+18, 1821)-Net over F4 — Constructive and digital
Digital (76, 94, 1821)-net over F4, using
- 42 times duplication [i] based on digital (74, 92, 1821)-net over F4, using
- net defined by OOA [i] based on linear OOA(492, 1821, F4, 18, 18) (dual of [(1821, 18), 32686, 19]-NRT-code), using
- OA 9-folding and stacking [i] based on linear OA(492, 16389, F4, 18) (dual of [16389, 16297, 19]-code), using
- discarding factors / shortening the dual code based on linear OA(492, 16391, F4, 18) (dual of [16391, 16299, 19]-code), using
- construction X applied to Ce(17) ⊂ Ce(16) [i] based on
- linear OA(492, 16384, F4, 18) (dual of [16384, 16292, 19]-code), using an extension Ce(17) of the primitive narrow-sense BCH-code C(I) with length 16383 = 47−1, defining interval I = [1,17], and designed minimum distance d ≥ |I|+1 = 18 [i]
- linear OA(485, 16384, F4, 17) (dual of [16384, 16299, 18]-code), using an extension Ce(16) of the primitive narrow-sense BCH-code C(I) with length 16383 = 47−1, defining interval I = [1,16], and designed minimum distance d ≥ |I|+1 = 17 [i]
- linear OA(40, 7, F4, 0) (dual of [7, 7, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(40, s, F4, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(17) ⊂ Ce(16) [i] based on
- discarding factors / shortening the dual code based on linear OA(492, 16391, F4, 18) (dual of [16391, 16299, 19]-code), using
- OA 9-folding and stacking [i] based on linear OA(492, 16389, F4, 18) (dual of [16389, 16297, 19]-code), using
- net defined by OOA [i] based on linear OOA(492, 1821, F4, 18, 18) (dual of [(1821, 18), 32686, 19]-NRT-code), using
(76, 76+18, 8197)-Net over F4 — Digital
Digital (76, 94, 8197)-net over F4, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(494, 8197, F4, 2, 18) (dual of [(8197, 2), 16300, 19]-NRT-code), using
- OOA 2-folding [i] based on linear OA(494, 16394, F4, 18) (dual of [16394, 16300, 19]-code), using
- construction XX applied to Ce(17) ⊂ Ce(16) ⊂ Ce(14) [i] based on
- linear OA(492, 16384, F4, 18) (dual of [16384, 16292, 19]-code), using an extension Ce(17) of the primitive narrow-sense BCH-code C(I) with length 16383 = 47−1, defining interval I = [1,17], and designed minimum distance d ≥ |I|+1 = 18 [i]
- linear OA(485, 16384, F4, 17) (dual of [16384, 16299, 18]-code), using an extension Ce(16) of the primitive narrow-sense BCH-code C(I) with length 16383 = 47−1, defining interval I = [1,16], and designed minimum distance d ≥ |I|+1 = 17 [i]
- linear OA(478, 16384, F4, 15) (dual of [16384, 16306, 16]-code), using an extension Ce(14) of the primitive narrow-sense BCH-code C(I) with length 16383 = 47−1, defining interval I = [1,14], and designed minimum distance d ≥ |I|+1 = 15 [i]
- linear OA(40, 8, F4, 0) (dual of [8, 8, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(40, s, F4, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- linear OA(41, 2, F4, 1) (dual of [2, 1, 2]-code), using
- dual of repetition code with length 2 [i]
- construction XX applied to Ce(17) ⊂ Ce(16) ⊂ Ce(14) [i] based on
- OOA 2-folding [i] based on linear OA(494, 16394, F4, 18) (dual of [16394, 16300, 19]-code), using
(76, 76+18, 2684177)-Net in Base 4 — Upper bound on s
There is no (76, 94, 2684178)-net in base 4, because
- the generalized Rao bound for nets shows that 4m ≥ 392 319834 432474 840673 790804 148091 472434 187396 793149 465434 > 494 [i]