Best Known (207−42, 207, s)-Nets in Base 3
(207−42, 207, 688)-Net over F3 — Constructive and digital
Digital (165, 207, 688)-net over F3, using
- t-expansion [i] based on digital (163, 207, 688)-net over F3, using
- 1 times m-reduction [i] based on digital (163, 208, 688)-net over F3, using
- trace code for nets [i] based on digital (7, 52, 172)-net over F81, using
- net from sequence [i] based on digital (7, 171)-sequence over F81, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F81 with g(F) = 7 and N(F) ≥ 172, using
- net from sequence [i] based on digital (7, 171)-sequence over F81, using
- trace code for nets [i] based on digital (7, 52, 172)-net over F81, using
- 1 times m-reduction [i] based on digital (163, 208, 688)-net over F3, using
(207−42, 207, 2222)-Net over F3 — Digital
Digital (165, 207, 2222)-net over F3, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(3207, 2222, F3, 42) (dual of [2222, 2015, 43]-code), using
- discarding factors / shortening the dual code based on linear OA(3207, 2226, F3, 42) (dual of [2226, 2019, 43]-code), using
- strength reduction [i] based on linear OA(3207, 2226, F3, 43) (dual of [2226, 2019, 44]-code), using
- construction X applied to C([0,21]) ⊂ C([0,18]) [i] based on
- linear OA(3197, 2188, F3, 43) (dual of [2188, 1991, 44]-code), using the expurgated narrow-sense BCH-code C(I) with length 2188 | 314−1, defining interval I = [0,21], and minimum distance d ≥ |{−21,−20,…,21}|+1 = 44 (BCH-bound) [i]
- linear OA(3169, 2188, F3, 37) (dual of [2188, 2019, 38]-code), using the expurgated narrow-sense BCH-code C(I) with length 2188 | 314−1, defining interval I = [0,18], and minimum distance d ≥ |{−18,−17,…,18}|+1 = 38 (BCH-bound) [i]
- linear OA(310, 38, F3, 5) (dual of [38, 28, 6]-code), using
- discarding factors / shortening the dual code based on linear OA(310, 39, F3, 5) (dual of [39, 29, 6]-code), using
- construction X applied to C([0,21]) ⊂ C([0,18]) [i] based on
- strength reduction [i] based on linear OA(3207, 2226, F3, 43) (dual of [2226, 2019, 44]-code), using
- discarding factors / shortening the dual code based on linear OA(3207, 2226, F3, 42) (dual of [2226, 2019, 43]-code), using
(207−42, 207, 219015)-Net in Base 3 — Upper bound on s
There is no (165, 207, 219016)-net in base 3, because
- the generalized Rao bound for nets shows that 3m ≥ 580 941336 590686 919423 297947 801099 292790 129804 071932 594857 943880 042049 873223 322104 026847 305275 320209 > 3207 [i]