Таблица F3.A-1.4 Свертка 2-х векторов (r)X[t] и (r)H[t] длины T=16 GF( 1 + 223 ) = GF( 1 + 28 ) = GF( F3 ) в (A-1)-арифметике, T–1 = 1/T = - 16 Результаты в A-арифметике в 9-ти битовых числах = ПСАНВ± mod F3, т.е. в диапазоне [128..+128] |
t |
(r)X[t] вх.Сигнал |
(r)X[f]= ЧПФ((r)X[t]) |
(r)H[t] вх.Сигнал |
(r)H[f]= ЧПФ((r)H[t]) |
(r)E[f]= (r)X[f]·(r)H[f] |
(r)E[t]= оЧПФ((r)E[f]) |
(r)G[t]= (r)E[t]/T mod F2 |
0 | + 2 | + 18 | + 1 | + 3 | + 54 | + 32 | + 2 |
1 | + 15 | + 36 | + 2 | + 5 | - 77 | + 47 | + 19 |
2 | + 1 | + 78 | 0 | + 9 | - 69 | - 18 | + 31 |
3 | 0 | - 71 | 0 | + 17 | + 78 | + 32 | + 2 |
4 | 0 | - 16 | 0 | + 33 | - 14 | 0 | 0 |
5 | 0 | - 36 | 0 | + 65 | - 27 | 0 | 0 |
6 | 0 | - 82 | 0 | -128 | - 41 | 0 | 0 |
7 | 0 | + 59 | 0 | 0 | 0 | 0 | 0 |
8 | 0 | - 12 | 0 | - 1 | + 12 | 0 | 0 |
9 | 0 | - 24 | 0 | - 3 | + 72 | 0 | 0 |
10 | 0 | - 42 | 0 | - 7 | + 37 | 0 | 0 |
11 | 0 | - 54 | 0 | - 15 | + 39 | 0 | 0 |
12 | 0 | + 18 | 0 | - 31 | - 44 | 0 | 0 |
13 | 0 | + 32 | 0 | - 63 | + 40 | 0 | 0 |
14 | 0 | + 54 | 0 | -127 | + 81 | 0 | 0 |
15 | 0 | + 74 | 0 | + 2 | -109 | 0 | 0 |