Best Known (39, 49, s)-Nets in Base 7
(39, 49, 23531)-Net over F7 — Constructive and digital
Digital (39, 49, 23531)-net over F7, using
- net defined by OOA [i] based on linear OOA(749, 23531, F7, 10, 10) (dual of [(23531, 10), 235261, 11]-NRT-code), using
- OA 5-folding and stacking [i] based on linear OA(749, 117655, F7, 10) (dual of [117655, 117606, 11]-code), using
- construction X applied to Ce(9) ⊂ Ce(8) [i] based on
- linear OA(749, 117649, F7, 10) (dual of [117649, 117600, 11]-code), using an extension Ce(9) of the primitive narrow-sense BCH-code C(I) with length 117648 = 76−1, defining interval I = [1,9], and designed minimum distance d ≥ |I|+1 = 10 [i]
- linear OA(743, 117649, F7, 9) (dual of [117649, 117606, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 117648 = 76−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(70, 6, F7, 0) (dual of [6, 6, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(70, s, F7, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(9) ⊂ Ce(8) [i] based on
- OA 5-folding and stacking [i] based on linear OA(749, 117655, F7, 10) (dual of [117655, 117606, 11]-code), using
(39, 49, 73808)-Net over F7 — Digital
Digital (39, 49, 73808)-net over F7, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(749, 73808, F7, 10) (dual of [73808, 73759, 11]-code), using
- discarding factors / shortening the dual code based on linear OA(749, 117649, F7, 10) (dual of [117649, 117600, 11]-code), using
- an extension Ce(9) of the primitive narrow-sense BCH-code C(I) with length 117648 = 76−1, defining interval I = [1,9], and designed minimum distance d ≥ |I|+1 = 10 [i]
- discarding factors / shortening the dual code based on linear OA(749, 117649, F7, 10) (dual of [117649, 117600, 11]-code), using
(39, 49, large)-Net in Base 7 — Upper bound on s
There is no (39, 49, large)-net in base 7, because
- 8 times m-reduction [i] would yield (39, 41, large)-net in base 7, but