Patent ID: 11936478
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A transmitting method comprising:
encoding input bits to generate parity bits based on a low density parity check (LDPC), a code rate of the LDPC code being 12/15 and a code length of the LDPC code being 64800 bits;
interleaving the parity bits;
splitting a codeword comprising the input bits and the interleaved parity bits into a plurality of bit groups;
interleaving the plurality of bit groups;
interleaving bits of the interleaved plurality of bit groups; and
mapping the interleaved bits to constellation points for 256-quadrature amplitude modulation (QAM),
wherein the plurality of bit groups are interleaved based on a following equation:

Yj=Xπ(j)(0≤j<Ngroup)

where Xj is a jth bit group among the plurality of bit groups, Yj is a jth bit group among the interleaved plurality of bit groups, Ngroup is a number of the plurality of bit groups, and π(j) denotes an interleaving order for the interleaving, and
wherein the π(j) is represented as follows:, Interleaving Order π(j) (0 ≤ j < 180)

j
0
1
2
3
4
5
6
7
8
9
10
11

23
24
25
26
27
28
29
30
31
32
33
34

46
47
48
49
50
51
52
53
54
55
56
57

69
70
71
72
73
74
75
76
77
78
79
80

92
93
94
95
96
97
98
99
100
101
102
103

115
116
117
118
119
120
121
122
123
124
125
126

138
139
140
141
142
143
144
145
146
147
148
149

161
162
163
164
165
166
167
168
169
170
171
172

π(j)
51
122
91
111
95
100
119
130
78
57
65
26

14
3
21
71
134
2
0
140
106
7
118
23

129
107
30
45
137
114
37
87
53
85
101
141

97
38
124
86
33
74
32
29
128
67
104
80

54
40
81
103
121
76
44
84
96
123
154
98

36
59
90
79
52
133
60
92
139
110
27
73

164
158
157
160
150
171
167
145
151
153
9
155

148
172
178
24
22
179
4
163
174
173
19
10

Interleaving Order π(j) (0 ≤ j < 180)

j
12
13
14
15
16
17
18
19
20
21
22

35
36
37
38
39
40
41
42
43
44
45

58
59
60
61
62
63
64
65
66
67
68

81
82
83
84
85
86
87
88
89
90
91

104
105
106
107
108
109
110
111
112
113
114

127
128
129
130
131
132
133
134
135
136
137

150
151
152
153
154
155
156
157
158
159
160

173
174
175
176
177
178
179

π(j)
61
126
105
143
70
132
39
102
115
116
6

35
20
17
50
48
112
13
66
5
75
42

120
99
88
117
64
28
135
138
108
113
58

127
56
34
89
94
49
55
93
136
68
62

82
142
46
169
131
72
47
69
125
31
83

43
77
109
63
41
168
147
161
165
175
162

170
146
166
149
15
159
11
176
152
156
144

177
12
16
1
8
18
25.