Best Known (32, 49, s)-Nets in Base 64
(32, 49, 32768)-Net over F64 — Constructive and digital
Digital (32, 49, 32768)-net over F64, using
- net defined by OOA [i] based on linear OOA(6449, 32768, F64, 17, 17) (dual of [(32768, 17), 557007, 18]-NRT-code), using
- OOA 8-folding and stacking with additional row [i] based on linear OA(6449, 262145, F64, 17) (dual of [262145, 262096, 18]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 262145 | 646−1, defining interval I = [0,8], and minimum distance d ≥ |{−8,−7,…,8}|+1 = 18 (BCH-bound) [i]
- OOA 8-folding and stacking with additional row [i] based on linear OA(6449, 262145, F64, 17) (dual of [262145, 262096, 18]-code), using
(32, 49, 111096)-Net over F64 — Digital
Digital (32, 49, 111096)-net over F64, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(6449, 111096, F64, 2, 17) (dual of [(111096, 2), 222143, 18]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(6449, 131073, F64, 2, 17) (dual of [(131073, 2), 262097, 18]-NRT-code), using
- OOA 2-folding [i] based on linear OA(6449, 262146, F64, 17) (dual of [262146, 262097, 18]-code), using
- discarding factors / shortening the dual code based on linear OA(6449, 262147, F64, 17) (dual of [262147, 262098, 18]-code), using
- construction X applied to Ce(16) ⊂ Ce(15) [i] based on
- linear OA(6449, 262144, F64, 17) (dual of [262144, 262095, 18]-code), using an extension Ce(16) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,16], and designed minimum distance d ≥ |I|+1 = 17 [i]
- linear OA(6446, 262144, F64, 16) (dual of [262144, 262098, 17]-code), using an extension Ce(15) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,15], and designed minimum distance d ≥ |I|+1 = 16 [i]
- linear OA(640, 3, F64, 0) (dual of [3, 3, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(640, s, F64, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(16) ⊂ Ce(15) [i] based on
- discarding factors / shortening the dual code based on linear OA(6449, 262147, F64, 17) (dual of [262147, 262098, 18]-code), using
- OOA 2-folding [i] based on linear OA(6449, 262146, F64, 17) (dual of [262146, 262097, 18]-code), using
- discarding factors / shortening the dual code based on linear OOA(6449, 131073, F64, 2, 17) (dual of [(131073, 2), 262097, 18]-NRT-code), using
(32, 49, large)-Net in Base 64 — Upper bound on s
There is no (32, 49, large)-net in base 64, because
- 15 times m-reduction [i] would yield (32, 34, large)-net in base 64, but