Best Known (31, 31+9, s)-Nets in Base 2
(31, 31+9, 133)-Net over F2 — Constructive and digital
Digital (31, 40, 133)-net over F2, using
- net defined by OOA [i] based on linear OOA(240, 133, F2, 9, 9) (dual of [(133, 9), 1157, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(240, 133, F2, 8, 9) (dual of [(133, 8), 1024, 10]-NRT-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(240, 533, F2, 9) (dual of [533, 493, 10]-code), using
- adding a parity check bit [i] based on linear OA(239, 532, F2, 8) (dual of [532, 493, 9]-code), using
- construction XX applied to C1 = C([509,4]), C2 = C([1,6]), C3 = C1 + C2 = C([1,4]), and C∩ = C1 ∩ C2 = C([509,6]) [i] based on
- linear OA(228, 511, F2, 7) (dual of [511, 483, 8]-code), using the primitive BCH-code C(I) with length 511 = 29−1, defining interval I = {−2,−1,…,4}, and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(227, 511, F2, 6) (dual of [511, 484, 7]-code), using the primitive narrow-sense BCH-code C(I) with length 511 = 29−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(237, 511, F2, 9) (dual of [511, 474, 10]-code), using the primitive BCH-code C(I) with length 511 = 29−1, defining interval I = {−2,−1,…,6}, and designed minimum distance d ≥ |I|+1 = 10 [i]
- linear OA(218, 511, F2, 4) (dual of [511, 493, 5]-code), using the primitive narrow-sense BCH-code C(I) with length 511 = 29−1, defining interval I = [1,4], and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(21, 11, F2, 1) (dual of [11, 10, 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
- linear OA(21, 10, F2, 1) (dual of [10, 9, 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 (see above)
- construction XX applied to C1 = C([509,4]), C2 = C([1,6]), C3 = C1 + C2 = C([1,4]), and C∩ = C1 ∩ C2 = C([509,6]) [i] based on
- adding a parity check bit [i] based on linear OA(239, 532, F2, 8) (dual of [532, 493, 9]-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(240, 533, F2, 9) (dual of [533, 493, 10]-code), using
- appending kth column [i] based on linear OOA(240, 133, F2, 8, 9) (dual of [(133, 8), 1024, 10]-NRT-code), using
(31, 31+9, 234)-Net over F2 — Digital
Digital (31, 40, 234)-net over F2, using
- net defined by OOA [i] based on linear OOA(240, 234, F2, 9, 9) (dual of [(234, 9), 2066, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(240, 234, F2, 8, 9) (dual of [(234, 8), 1832, 10]-NRT-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(240, 234, F2, 2, 9) (dual of [(234, 2), 428, 10]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(240, 266, F2, 2, 9) (dual of [(266, 2), 492, 10]-NRT-code), using
- OOA 2-folding [i] based on linear OA(240, 532, F2, 9) (dual of [532, 492, 10]-code), using
- discarding factors / shortening the dual code based on linear OA(240, 533, F2, 9) (dual of [533, 493, 10]-code), using
- adding a parity check bit [i] based on linear OA(239, 532, F2, 8) (dual of [532, 493, 9]-code), using
- construction XX applied to C1 = C([509,4]), C2 = C([1,6]), C3 = C1 + C2 = C([1,4]), and C∩ = C1 ∩ C2 = C([509,6]) [i] based on
- linear OA(228, 511, F2, 7) (dual of [511, 483, 8]-code), using the primitive BCH-code C(I) with length 511 = 29−1, defining interval I = {−2,−1,…,4}, and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(227, 511, F2, 6) (dual of [511, 484, 7]-code), using the primitive narrow-sense BCH-code C(I) with length 511 = 29−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(237, 511, F2, 9) (dual of [511, 474, 10]-code), using the primitive BCH-code C(I) with length 511 = 29−1, defining interval I = {−2,−1,…,6}, and designed minimum distance d ≥ |I|+1 = 10 [i]
- linear OA(218, 511, F2, 4) (dual of [511, 493, 5]-code), using the primitive narrow-sense BCH-code C(I) with length 511 = 29−1, defining interval I = [1,4], and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(21, 11, F2, 1) (dual of [11, 10, 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
- linear OA(21, 10, F2, 1) (dual of [10, 9, 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 (see above)
- construction XX applied to C1 = C([509,4]), C2 = C([1,6]), C3 = C1 + C2 = C([1,4]), and C∩ = C1 ∩ C2 = C([509,6]) [i] based on
- adding a parity check bit [i] based on linear OA(239, 532, F2, 8) (dual of [532, 493, 9]-code), using
- discarding factors / shortening the dual code based on linear OA(240, 533, F2, 9) (dual of [533, 493, 10]-code), using
- OOA 2-folding [i] based on linear OA(240, 532, F2, 9) (dual of [532, 492, 10]-code), using
- discarding factors / shortening the dual code based on linear OOA(240, 266, F2, 2, 9) (dual of [(266, 2), 492, 10]-NRT-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(240, 234, F2, 2, 9) (dual of [(234, 2), 428, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(240, 234, F2, 8, 9) (dual of [(234, 8), 1832, 10]-NRT-code), using
(31, 31+9, 1900)-Net in Base 2 — Upper bound on s
There is no (31, 40, 1901)-net in base 2, because
- 1 times m-reduction [i] would yield (31, 39, 1901)-net in base 2, but
- the generalized Rao bound for nets shows that 2m ≥ 550465 327191 > 239 [i]