| 27 | |
| 28 | template<typename B> |
| 29 | std::vector<std::vector<int>> |
| 30 | Encoder_RSC_generic_json_sys<B>::get_trellis() |
| 31 | { |
| 32 | std::vector<std::vector<int>> trellis(10, std::vector<int>(this->n_states)); |
| 33 | |
| 34 | std::vector<bool> occurrence(this->n_states, false); |
| 35 | |
| 36 | for (auto i = 0; i < this->n_states; i++) |
| 37 | { |
| 38 | // sys = 0 |
| 39 | auto state = i; |
| 40 | auto bit_sys = 0; |
| 41 | auto bit_par = Encoder_RSC_generic_sys<B>::inner_encode(bit_sys, state); |
| 42 | |
| 43 | trellis[0 + (occurrence[state] ? 3 : 0)][state] = i; // initial state |
| 44 | trellis[1 + (occurrence[state] ? 3 : 0)][state] = +1; // gamma coeff |
| 45 | trellis[2 + (occurrence[state] ? 3 : 0)][state] = bit_sys ^ bit_par; // gamma |
| 46 | trellis[6][i] = state; // final state, bit syst = 0 |
| 47 | trellis[7][i] = bit_sys ^ bit_par; // gamma , bit syst = 0 |
| 48 | |
| 49 | occurrence[state] = true; |
| 50 | |
| 51 | // sys = 1 |
| 52 | state = i; |
| 53 | bit_sys = 1; |
| 54 | bit_par = Encoder_RSC_generic_sys<B>::inner_encode(bit_sys, state); |
| 55 | |
| 56 | trellis[0 + (occurrence[state] ? 3 : 0)][state] = i; // initial state |
| 57 | trellis[1 + (occurrence[state] ? 3 : 0)][state] = -1; // gamma coeff |
| 58 | trellis[2 + (occurrence[state] ? 3 : 0)][state] = bit_sys ^ bit_par; // gamma |
| 59 | trellis[8][i] = state; // initial state, bit syst = 1 |
| 60 | trellis[9][i] = bit_sys ^ bit_par; // gamma , bit syst = 1 |
| 61 | |
| 62 | occurrence[state] = true; |
| 63 | } |
| 64 | |
| 65 | return trellis; |
| 66 | } |
| 67 | |
| 68 | template<typename B> |
| 69 | int |