Patent ID: 11916665
Assignee: PANASONIC HOLDINGS CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transmission method performed by a transmitter, the transmission method comprising:
generating, by a coding circuit of the transmitter, a codeword according to repeat accumulate quasi-cyclic low-density parity-check coding such that the codeword consists of N cyclic blocks, the N cyclic blocks each consist of Q bits, each of N and Q is a positive integer, and a code rate of the codeword is 7/15;
reordering, by an interleaving circuit of the transmitter, the N cyclic blocks;
mapping, by a mapping circuit of the transmitter, bits in the codeword onto constellation points of a non-uniform 4096 QAM scheme to generate mapped bits after the N cyclic blocks are reordered; and
generating, by a signaling circuit of the transmitter, a transmission signal by performing orthogonal frequency-division multiplexing (OFDM) modulation on the mapped bits, wherein
the N cyclic blocks are reordered according to Table 1 which is associated with the code rate, and
in the Table 1, the j-th block of Group-wise Interleaver Output indicates the index of the cyclic block after the N cyclic blocks are reordered, and the it(j)-th block of Group-wise Interleaver Input indicates the index of the cyclic block before the N cyclic blocks are reordered, TABLE 1

j−th
π (j)−th 

block of
block of

Group−wise
Group−wise

Interleaver
Interleaver

output
input

0
59

1
122

2
161

3
93

4
37

5
112

6
111

7
62

8
42

9
102

10
119

11
72

12
60

13
144

14
34

15
120

16
46

17
31

18
129

19
172

20
149

21
94

22
65

23
9

24
0

25
76

26
13

27
61

28
3

29
70

30
40

31
78

32
127

33
35

34
145

35
28

36
48

37
162

38
92

39
73

40
6

41
134

42
66

43
160

44
133

45
101

46
4

47
5

48
87

49
106

50
79

51
104

52
168

53
163

54
170

55
57

56
83

57
44

58
54

59
110

60
30

61
50

62
82

63
10

64
148

65
98

66
41

67
22

68
96

69
49

70
90

71
100

72
29

73
39

74
175

75
38

76
109

77
91

78
74

79
159

80
139

81
177

82
71

83
47

84
146

85
63

86
86

87
45

88
123

89
33

90
138

91
51

92
89

93
88

94
167

95
80

96
142

97
108

98
69

99
7

100
103

101
115

102
99

103
135

104
36

105
11

106
166

107
169

108
8

109
165

110
68

111
173

112
140

113
95

114
179

115
2

116
125

117
105

118
1

119
116

120
150

121
174

122
15

123
75

124
64

125
176

126
81

127
55

128
130

129
151

130
156

131
53

132
171

133
16

134
113

135
24

136
117

137
154

138
157

139
164

140
143

141
12

142
56

143
152

144
20

145
85

146
84

147
77

148
158

149
107

150
32

151
153

152
147

153
132

154
124

155
52

156
121

157
58

158
118

159
137

160
114

161
97

162
19

163
155

164
67

165
25

166
17

167
126

168
23

169
43

170
27

171
21

172
136

173
131

174
26

175
14

176
18

177
128

178
141

179
178.