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Таблица F4.A-1.5 Свертка 2-х векторов (r)X[t] и (r)H[t] длины T= 8 GF( 1 + 224 ) = GF( 1 + 216 ) = GF( F4 ) в (A-1)-арифметике, T–1 = 1/T = 0'224. 0 = 57345 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. 31 = 32 | 0' 0. 63 = 64 | 0' 0. 0 = 1 | 0' 0. 2 = 3 | 0' 0.191 = 192 | 0' 0.255 = 256 | 0' 0. 31 = 32 |
| 1 | 0' 0. 63 = 64 | 0'228. 32 = 58401 | 0' 0. 1 = 2 | 0' 0. 32 = 33 | 0'104. 35 = 26660 | 0' 3.255 = 1024 | 0' 0.127 = 128 |
| 2 | 0'255.224 = 65505 | 0' 64. 63 = 16448 | 1' 0. 0 = 0 | 0' 2. 0 = 513 | 0'191.191 = 49088 | 0' 2.255 = 768 | 0' 0. 95 = 96 |
| 3 | 1' 0. 0 = 0 | 0' 32. 27 = 8220 | 1' 0. 0 = 0 | 0' 32. 0 = 8193 | 0'156. 24 = 39961 | 0'254. 0 = 65025 | 0'255.192 = 65473 |
| 4 | 1' 0. 0 = 0 | 0'255.192 = 65473 | 1' 0. 0 = 0 | 0'255.255 = 2^16 | 0' 0. 63 = 64 | 1' 0. 0 = 0 | 1' 0. 0 = 0 |
| 5 | 1' 0. 0 = 0 | 0'220. 32 = 56353 | 1' 0. 0 = 0 | 0'255.225 = 65506 | 0' 88. 27 = 22556 | 1' 0. 0 = 0 | 1' 0. 0 = 0 |
| 6 | 1' 0. 0 = 0 | 0'192. 64 = 49217 | 1' 0. 0 = 0 | 0'254. 1 = 65026 | 0' 63.192 = 16321 | 1' 0. 0 = 0 | 1' 0. 0 = 0 |
| 7 | 1' 0. 0 = 0 | 0' 32. 35 = 8228 | 1' 0. 0 = 0 | 0'224. 1 = 57346 | 0'164. 40 = 42025 | 1' 0. 0 = 0 | 1' 0. 0 = 0 |