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Таблица F4.A-1.5 Свертка 2-х векторов (r)X[t] и (r)H[t] длины T= 4 GF( 1 + 224 ) = GF( 1 + 216 ) = GF( F4 ) в (A-1)-арифметике, T–1 = 1/T = 0'192. 0 = 49153 Результаты в (A-1)-арифметике в виде 17-битовых слов = ПСНВ+ mod F4, т.е. в диапазоне [ 0..+65536] |
| 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 | 0' 0. 0 = 1 | 0' 0. 2 = 3 | 1' 0. 0 = 0 | 0' 0. 1 = 2 | 0' 0. 5 = 6 | 0' 0. 3 = 4 | 0' 0. 0 = 1 |
| 1 | 0' 0. 0 = 1 | 0' 0. 0 = 1 | 0' 0. 0 = 1 | 0' 0.254 = 255 | 0' 0.254 = 255 | 0' 0. 7 = 8 | 0' 0. 1 = 2 |
| 2 | 1' 0. 0 = 0 | 0'255.255 = 2^16 | 0' 0. 0 = 1 | 1' 0. 0 = 0 | 1' 0. 0 = 0 | 0' 0. 7 = 8 | 0' 0. 1 = 2 |
| 3 | 0' 0. 0 = 1 | 0' 0. 0 = 1 | 1' 0. 0 = 0 | 0'254.255 = 65280 | 0'254.255 = 65280 | 0' 0. 3 = 4 | 0' 0. 0 = 1 |