Best Known (157, 157+40, s)-Nets in Base 2
(157, 157+40, 260)-Net over F2 — Constructive and digital
Digital (157, 197, 260)-net over F2, using
- t-expansion [i] based on digital (156, 197, 260)-net over F2, using
- 3 times m-reduction [i] based on digital (156, 200, 260)-net over F2, using
- trace code for nets [i] based on digital (6, 50, 65)-net over F16, using
- net from sequence [i] based on digital (6, 64)-sequence over F16, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F16 with g(F) = 6 and N(F) ≥ 65, using
- the Hermitian function field over F16 [i]
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F16 with g(F) = 6 and N(F) ≥ 65, using
- net from sequence [i] based on digital (6, 64)-sequence over F16, using
- trace code for nets [i] based on digital (6, 50, 65)-net over F16, using
- 3 times m-reduction [i] based on digital (156, 200, 260)-net over F2, using
(157, 157+40, 514)-Net over F2 — Digital
Digital (157, 197, 514)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2197, 514, F2, 2, 40) (dual of [(514, 2), 831, 41]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2197, 522, F2, 2, 40) (dual of [(522, 2), 847, 41]-NRT-code), using
- OOA 2-folding [i] based on linear OA(2197, 1044, F2, 40) (dual of [1044, 847, 41]-code), using
- 1 times truncation [i] based on linear OA(2198, 1045, F2, 41) (dual of [1045, 847, 42]-code), using
- construction XX applied to C1 = C([1021,36]), C2 = C([0,38]), C3 = C1 + C2 = C([0,36]), and C∩ = C1 ∩ C2 = C([1021,38]) [i] based on
- linear OA(2186, 1023, F2, 39) (dual of [1023, 837, 40]-code), using the primitive BCH-code C(I) with length 1023 = 210−1, defining interval I = {−2,−1,…,36}, and designed minimum distance d ≥ |I|+1 = 40 [i]
- linear OA(2186, 1023, F2, 39) (dual of [1023, 837, 40]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 1023 = 210−1, defining interval I = [0,38], and designed minimum distance d ≥ |I|+1 = 40 [i]
- linear OA(2196, 1023, F2, 41) (dual of [1023, 827, 42]-code), using the primitive BCH-code C(I) with length 1023 = 210−1, defining interval I = {−2,−1,…,38}, and designed minimum distance d ≥ |I|+1 = 42 [i]
- linear OA(2176, 1023, F2, 37) (dual of [1023, 847, 38]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 1023 = 210−1, defining interval I = [0,36], and designed minimum distance d ≥ |I|+1 = 38 [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, 11, F2, 1) (dual of [11, 10, 2]-code) (see above)
- construction XX applied to C1 = C([1021,36]), C2 = C([0,38]), C3 = C1 + C2 = C([0,36]), and C∩ = C1 ∩ C2 = C([1021,38]) [i] based on
- 1 times truncation [i] based on linear OA(2198, 1045, F2, 41) (dual of [1045, 847, 42]-code), using
- OOA 2-folding [i] based on linear OA(2197, 1044, F2, 40) (dual of [1044, 847, 41]-code), using
- discarding factors / shortening the dual code based on linear OOA(2197, 522, F2, 2, 40) (dual of [(522, 2), 847, 41]-NRT-code), using
(157, 157+40, 7634)-Net in Base 2 — Upper bound on s
There is no (157, 197, 7635)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 201137 681925 964902 156779 967437 144702 848396 403124 387709 858648 > 2197 [i]