Best Known (143, 180, s)-Nets in Base 3
(143, 180, 688)-Net over F3 — Constructive and digital
Digital (143, 180, 688)-net over F3, using
- t-expansion [i] based on digital (142, 180, 688)-net over F3, using
- trace code for nets [i] based on digital (7, 45, 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, 45, 172)-net over F81, using
(143, 180, 1883)-Net over F3 — Digital
Digital (143, 180, 1883)-net over F3, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(3180, 1883, F3, 37) (dual of [1883, 1703, 38]-code), using
- discarding factors / shortening the dual code based on linear OA(3180, 2227, F3, 37) (dual of [2227, 2047, 38]-code), using
- construction X applied to C([0,18]) ⊂ C([0,15]) [i] based on
- 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(3141, 2188, F3, 31) (dual of [2188, 2047, 32]-code), using the expurgated narrow-sense BCH-code C(I) with length 2188 | 314−1, defining interval I = [0,15], and minimum distance d ≥ |{−15,−14,…,15}|+1 = 32 (BCH-bound) [i]
- linear OA(311, 39, F3, 5) (dual of [39, 28, 6]-code), using
- discarding factors / shortening the dual code based on linear OA(311, 40, F3, 5) (dual of [40, 29, 6]-code), using
- (u, u−v, u+v+w)-construction [i] based on
- linear OA(31, 13, F3, 1) (dual of [13, 12, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(31, s, F3, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- linear OA(33, 13, F3, 2) (dual of [13, 10, 3]-code), using
- Hamming code H(3,3) [i]
- linear OA(37, 14, F3, 5) (dual of [14, 7, 6]-code), using
- extended quadratic residue code Qe(14,3) [i]
- linear OA(31, 13, F3, 1) (dual of [13, 12, 2]-code), using
- (u, u−v, u+v+w)-construction [i] based on
- discarding factors / shortening the dual code based on linear OA(311, 40, F3, 5) (dual of [40, 29, 6]-code), using
- construction X applied to C([0,18]) ⊂ C([0,15]) [i] based on
- discarding factors / shortening the dual code based on linear OA(3180, 2227, F3, 37) (dual of [2227, 2047, 38]-code), using
(143, 180, 209782)-Net in Base 3 — Upper bound on s
There is no (143, 180, 209783)-net in base 3, because
- 1 times m-reduction [i] would yield (143, 179, 209783)-net in base 3, but
- the generalized Rao bound for nets shows that 3m ≥ 25 393128 985918 157384 825359 216251 404120 966870 301566 664082 072522 255698 523477 849498 306381 > 3179 [i]