CN105376012A - Interleaving and mapping method and de-interleaving and de-mapping method of LDPC code word - Google Patents

Interleaving and mapping method and de-interleaving and de-mapping method of LDPC code word Download PDF

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Publication number
CN105376012A
CN105376012A CN201410438349.3A CN201410438349A CN105376012A CN 105376012 A CN105376012 A CN 105376012A CN 201410438349 A CN201410438349 A CN 201410438349A CN 105376012 A CN105376012 A CN 105376012A
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China
Prior art keywords
ldpc code
code word
bit
value data
soft value
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CN201410438349.3A
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Chinese (zh)
Inventor
张文军
徐洪亮
何大治
郭序峰
赵杰
杨帆
尧勇仕
史毅俊
徐胤
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Shanghai National Engineering Research Center of Digital Television Co Ltd
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Shanghai National Engineering Research Center of Digital Television Co Ltd
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Priority to CN201410438349.3A priority Critical patent/CN105376012A/en
Publication of CN105376012A publication Critical patent/CN105376012A/en
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Abstract

The invention provides an interleaving and mapping method and a de-interleaving and de-mapping method of LDPC code word. The method includes: dividing the LDPC code word after coding into a plurality of continuous bit sub-blocks according to a predetermined length, transforming the arranging sequence of the bit sub-blocks according to a corresponding bit transformation pattern, and forming the LDPC code word after the first bit interleaving; writing in the LDPC code word after the first bit interleaving according to the column sequence and reading out and obtaining the LDPC code word after the second bit interleaving according to the row sequence; and performing constellation mapping of the LDPC code word after the second bit interleaving according to a constellation diagram in order to obtain a symbol stream. The interleaving mapping and de-interleaving and de-mapping methods are selected according to different LDPC code lists, and the system performance can be better enhanced.

Description

The intertexture of LDPC code word and mapping method and deinterleaving de-mapping method
Technical field
The present invention relates to digital television techniques field, particularly a kind of intertexture of LDPC code word and mapping method and deinterleaving de-mapping method.
Background technology
In existing broadcast communication standard, LDPC coding, Bit Interleave and constellation mapping are code modulation modes the most common.In different emission systems, LDPC coding, Bit Interleave and constellation mapping all need independent design, and combined debugging, to obtain best channel performance.Therefore, how forming Bit Interleave targetedly for specific LDPC code word and constellation mapping mode, is a technical barrier of this area.
Summary of the invention
The problem that the present invention solves cannot form Bit Interleave targetedly for specific LDPC code word and constellation mapping mode in prior art.
For solving the problem, embodiments provide a kind of intertexture and mapping method of LDPC code word, comprise the steps: by coding after LDPC code word be divided into the multiple sub-blocks of bits of continuous print by predetermined length, and according to sub-blocks of bits described in corresponding bit exchange pattern change put in order formed first time Bit Interleave after LDPC code word; By the LDPC code word column major order write memory space after described first time Bit Interleave and by row order reads the LDPC code word after obtaining second time Bit Interleave in this memory space; Constellation mapping is carried out to obtain symbol stream according to corresponding planisphere to the LDPC code word after described second time Bit Interleave.
The embodiment of the present invention additionally provides a kind of deinterleaving de-mapping method of LDPC code word, comprises the steps: to carry out soft demapping process to obtain bit soft value data to symbol stream soft value data according to corresponding planisphere; Wherein said symbol stream soft value data are the symbol stream that interlace map method that receiving terminal receives LDPC code word described above obtains; Described bit soft value data are sequentially written in memory space by row and column major order reads to obtain first time than the bit soft value data after deinterleave in this memory space; Described first time is divided into the multiple bit soft value data sub-block of continuous print than the bit soft value data after deinterleave by predetermined length, and according to bit soft value data sub-block described in corresponding bit exchange pattern change put in order form second time than the bit soft value data after deinterleave; LDPC decoding process is carried out to obtain decoded bitstream data to described bit soft value data flow.
Compared with prior art, technical solution of the present invention has the following advantages:
Corresponding interlace map and deinterleaving de-mapping method is selected better to be promoted to make systematic function for specific LDPC code table.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the interlace map method of a kind of LDPC code word of the present invention;
Fig. 2 is the schematic flow sheet of the embodiment of the deinterleaving de-mapping method of a kind of LDPC code word of the present invention;
Fig. 3 is the schematic diagram put in order according to sub-blocks of bits described in bit exchange pattern change in the interlace map method of a kind of LDPC code word of the present invention.
Embodiment
Inventor finds in prior art, cannot form Bit Interleave targetedly for specific LDPC code word and constellation mapping mode.
For the problems referred to above, inventor is through research, provide a kind of interlace map method and deinterleaving de-mapping method of LDPC code word, select corresponding interlace map and deinterleaving de-mapping method better to be promoted to make systematic function for different LDPC code tables.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
In embodiments of the present invention, transmitter terminal is: first the bit stream after message sink coding, Bose-Chaudhuri-Hocquenghem Code is input to the coding that LDPC encoder carries out the LDPC code word of specific code check code length, input bit interleaver afterwards, interleaving treatment is carried out according to certain specific Bit Interleave patterning method, subsequently the data after Bit Interleave process are carried out the 256QAM constellation mapping of corresponding code check, modulate afterwards, launch, experience channel.Receiver end is: the data after channel are carried out demodulation, and the data input De-mapping module then after demodulation, carries out 256QAM demapping.Afterwards the bit soft value information that De-mapping module exports is input to de-interleaving block and carries out deinterleaving, output to ldpc decoder afterwards, the decoding based on specific LDPC code word is carried out to it, output bit flow of finally decoding.
As shown in Figure 1 be the schematic flow sheet of the embodiment of the interlace map method of a kind of LDPC code word of the present invention.With reference to figure 1, the interlace map method of LDPC code word comprises the steps:
Step S11: by coding after LDPC code word be divided into the multiple sub-blocks of bits of continuous print by predetermined length, and according to sub-blocks of bits described in corresponding bit exchange pattern change put in order formed second time Bit Interleave after LDPC code word;
Step S12: by the LDPC code word column major order write memory space after described first time Bit Interleave and by row order reads the LDPC code word after obtaining second time Bit Interleave in this memory space;
Step S13: constellation mapping is carried out to obtain symbol stream according to corresponding planisphere to the LDPC code word after described second time Bit Interleave.
In described step S13, the LDPC code word after described coding is divided into the multiple sub-blocks of bits of continuous print by predetermined length, wherein said predetermined length is 320.Further, according to sub-blocks of bits described in corresponding bit exchange pattern change put in order formed first time Bit Interleave after LDPC code word.Its detailed process is detailed as shown in Figure 3, in figure 3, and (m 0, m 1..., m n/320-1) be the bit exchange pattern of 320 length bits sub-blocks.
Particularly, the code length of the LDPC code word in LDPC code table is 19200, and corresponding bit exchange pattern is:
It should be noted that, in the present embodiment, each numerical value in described bit exchange pattern refers to the position without sub-blocks of bits described before bit exchange.Such as, first numerical value 59 implication in above-mentioned bit exchange pattern refers to and original after bit exchange, nowadays becomes first sub-blocks of bits without the 60th sub-blocks of bits before bit exchange.
Corresponding planisphere is:
Constellation point Complex symbol
0 0.53965-1.1734i
1 0.55489-1.1547i
2 0.53164-1.1869i
3 0.54537-1.1675i
4 0.4985-1.2202i
5 0.5111-1.1973i
6 0.4889-1.2357i
7 0.5045-1.2113i
8 0.53896-1.1742i
9 0.55351-1.1562i
10 0.52967-1.1878i
11 0.54639-1.1677i
12 0.4971-1.2216i
13 0.5126-1.1995i
14 0.4882-1.2371i
15 0.5045-1.2128i
16 1.1869-0.50826i
17 1.17-0.5218i
18 1.1985-0.4964i
19 1.1818-0.51294i
20 1.2209-0.4993i
21 1.2002-0.5148i
22 1.2342-0.4882i
23 1.2142-0.5052i
24 1.1876-0.50605i
25 1.1716-0.52328i
26 1.199-0.49688i
27 1.183-0.5141i
28 1.2209-0.4971i
29 1.2024-0.5148i
30 1.2349-0.4889i
31 1.215-0.5045i
32 0.27883-0.4743i
33 0.28106-0.47727i
34 0.28004-0.47176i
35 0.28157-0.47394i
36 0.28323-0.46659i
37 0.2728-0.47623i
38 0.27326-0.4706i
39 0.27153-0.47505i
40 0.27885-0.47509i
41 0.28036-0.47647i
42 0.27687-0.47317i
43 0.27919-0.47535i
44 0.28476-0.46531i
45 0.28625-0.46827i
46 0.27322-0.46991i
47 0.27474-0.4721i
48 0.47986-0.26914i
49 0.48138-0.27133i
50 0.48023-0.26569i
51 0.48096-0.26798i
52 0.46595-0.28295i
53 0.47546-0.27292i
54 0.47157-0.27279i
55 0.47429-0.27095i
56 0.47986-0.26913i
57 0.48068-0.27133i
58 0.47889-0.2681i
59 0.47961-0.27039i
60 0.48187-0.25639i
61 0.48263-0.25856i
62 0.47546-0.26595i
63 0.47697-0.26744i
64 -0.53965-1.1734i
65 -0.55489-1.1547i
66 -0.53164-1.1869i
67 -0.54537-1.1675i
68 -0.4985-1.2202i
69 -0.5111-1.1973i
70 -0.4889-1.2357i
71 -0.5045-1.2113i
72 -0.53896-1.1742i
73 -0.55351-1.1562i
74 -0.52967-1.1878i
75 -0.54639-1.1677i
76 -0.4971-1.2216i
77 -0.5126-1.1995i
78 -0.4882-1.2371i
79 -0.5045-1.2128i
80 -1.1869-0.50826i
81 -1.17-0.5218i
82 -1.1985-0.4964i
83 -1.1818-0.51294i
84 -1.2209-0.4993i
85 -1.2002-0.5148i
86 -1.2342-0.4882i
87 -1.2142-0.5052i
88 -1.1876-0.50605i
89 -1.1716-0.52328i
90 -1.199-0.49688i
91 -1.183-0.5141i
92 -1.2209-0.4971i
93 -1.2024-0.5148i
94 -1.2349-0.4889i
95 -1.215-0.5045i
96 -0.27883-0.4743i
97 -0.28106-0.47727i
98 -0.28004-0.47176i
99 -0.28157-0.47394i
100 -0.28323-0.46659i
101 -0.2728-0.47623i
102 -0.27326-0.4706i
103 -0.27153-0.47505i
104 -0.27885-0.47509i
105 -0.28036-0.47647i
106 -0.27687-0.47317i
107 -0.27919-0.47535i
108 -0.28476-0.46531i
109 -0.28625-0.46827i
110 -0.27322-0.46991i
111 -0.27474-0.4721i
112 -0.47986-0.26914i
113 -0.48138-0.27133i
114 -0.48023-0.26569i
115 -0.48096-0.26798i
116 -0.46595-0.28295i
117 -0.47546-0.27292i
118 -0.47157-0.27279i
119 -0.47429-0.27095i
120 -0.47986-0.26913i
121 -0.48068-0.27133i
122 -0.47889-0.2681i
123 -0.47961-0.27039i
124 -0.48187-0.25639i
125 -0.48263-0.25856i
126 -0.47546-0.26595i
127 -0.47697-0.26744i
128 0.53965+1.1734i
129 0.55489+1.1547i
130 0.53164+1.1869i
131 0.54537+1.1675i
132 0.4985+1.2202i
133 0.5111+1.1973i
134 0.4889+1.2357i
135 0.5045+1.2113i
136 0.53896+1.1742i
137 0.55351+1.1562i
138 0.52967+1.1878i
139 0.54639+1.1677i
140 0.4971+1.2216i
141 0.5126+1.1995i
142 0.4882+1.2371i
143 0.5045+1.2128i
144 1.1869+0.50826i
145 1.17+0.5218i
146 1.1985+0.4964i
147 1.1818+0.51294i
148 1.2209+0.4993i
149 1.2002+0.5148i
150 1.2342+0.4882i
151 1.2142+0.5052i
152 1.1876+0.50605i
153 1.1716+0.52328i
154 1.199+0.49688i
155 1.183+0.5141i
156 1.2209+0.4971i
157 1.2024+0.5148i
158 1.2349+0.4889i
159 1.215+0.5045i
160 0.27883+0.4743i
161 0.28106+0.47727i
162 0.28004+0.47176i
163 0.28157+0.47394i
164 0.28323+0.46659i
165 0.2728+0.47623i
166 0.27326+0.4706i
167 0.27153+0.47505i
168 0.27885+0.47509i
169 0.28036+0.47647i
170 0.27687+0.47317i
171 0.27919+0.47535i
172 0.28476+0.46531i
173 0.28625+0.46827i
174 0.27322+0.46991i
175 0.27474+0.4721i
176 0.47986+0.26914i
177 0.48138+0.27133i
178 0.48023+0.26569i
179 0.48096+0.26798i
180 0.46595+0.28295i
181 0.47546+0.27292i
182 0.47157+0.27279i
183 0.47429+0.27095i
184 0.47986+0.26913i
185 0.48068+0.27133i
186 0.47889+0.2681i
187 0.47961+0.27039i
188 0.48187+0.25639i
189 0.48263+0.25856i
190 0.47546+0.26595i
191 0.47697+0.26744i
192 -0.53965+1.1734i
193 -0.55489+1.1547i
194 -0.53164+1.1869i
195 -0.54537+1.1675i
196 -0.4985+1.2202i
197 -0.5111+1.1973i
198 -0.4889+1.2357i
199 -0.5045+1.2113i
200 -0.53896+1.1742i
201 -0.55351+1.1562i
202 -0.52967+1.1878i
203 -0.54639+1.1677i
204 -0.4971+1.2216i
205 -0.5126+1.1995i
206 -0.4882+1.2371i
207 -0.5045+1.2128i
208 -1.1869+0.50826i
209 -1.17+0.5218i
210 -1.1985+0.4964i
211 -1.1818+0.51294i
212 -1.2209+0.4993i
213 -1.2002+0.5148i
214 -1.2342+0.4882i
215 -1.2142+0.5052i
216 -1.1876+0.50605i
217 -1.1716+0.52328i
218 -1.199+0.49688i
219 -1.183+0.5141i
220 -1.2209+0.4971i
221 -1.2024+0.5148i
222 -1.2349+0.4889i
223 -1.215+0.5045i
224 -0.27883+0.4743i
225 -0.28106+0.47727i
226 -0.28004+0.47176i
227 -0.28157+0.47394i
228 -0.28323+0.46659i
229 -0.2728+0.47623i
230 -0.27326+0.4706i
231 -0.27153+0.47505i
232 -0.27885+0.47509i
233 -0.28036+0.47647i
234 -0.27687+0.47317i
235 -0.27919+0.47535i
236 -0.28476+0.46531i
237 -0.28625+0.46827i
238 -0.27322+0.46991i
239 -0.27474+0.4721i
240 -0.47986+0.26914i
241 -0.48138+0.27133i
242 -0.48023+0.26569i
243 -0.48096+0.26798i
244 -0.46595+0.28295i
245 -0.47546+0.27292i
246 -0.47157+0.27279i
247 -0.47429+0.27095i
248 -0.47986+0.26913i
249 -0.48068+0.27133i
250 -0.47889+0.2681i
251 -0.47961+0.27039i
252 -0.48187+0.25639i
253 -0.48263+0.25856i
254 -0.47546+0.26595i
255 -0.47697+0.26744i
In described step S12, such as, be the LDPC code word (the LDPC code word after first time Bit Interleave) of 19200 bits for code length, by its column major order write memory space and by row order reads in this memory space, wherein every row 2400 bit, totally 8 row.
Afterwards to the bitstream data (b after above-mentioned Bit Interleave 0, b 1..., b n-1), according to 256QAM planisphere, the decimal number corresponding to every eight binary bit sequence is mapped to some constellation point, obtains symbol stream (the corresponding constellation point of each complex symbol).Such as, the corresponding decimal number of 8 bits ' 00001101 ' of input is 13, then correspond to the constellation point of the 0.5126-1.1995i in 256QAM planisphere, this constellation point being shown as on real number axis and axis of imaginaries, real number axis 0.5126, axis of imaginaries-1.1995.Then utilize symbol stream to carry out generation OFDM symbol at modulation module, finally launch.
In the present embodiment, described LDPC code word be to message sink coding after bit stream obtain after specific LDPC coding, wherein said specific LDPC coding can adopt prior art to realize.
Particularly, the code word of this LDPC is with L × L (L is generally 320) for sub-block size, and code table is as follows:
Table 1 code check 1/5N ldpc=19200, L × L=320 × 320, M=153600
Before elaboration coding method, first to doing description below to the mother matrix of definite form:
Mother matrix has the capable n row of m, each digital p of the i-th row jth row ijthe all row representing unit matrix circulate to the right and offset p ijthe submatrix produced, the size of submatrix is 320 × 320.Such as, in table 1 p 00=20, this digitized representation matrix of 320 × 320, this matrix to be produced by 45 elements of circulation skew to the right by row by the unit matrix of 320 × 320; Such as p ijwhen=0, represent the unit matrix of 320 × 320; When the i-th row jth row do not have numeral, this place represents the full 0 matrix of 320 × 320; When the i-th row jth shows multiple numeral, represent the XOR that this place is the cyclic shift of multiple unit matrix, such as p ij = 10 25 Time, representing this matrix is by arranging matrix that 10 elements of circulation skew to the right obtain with the unit matrix by 320 × 320 by the matrix arranging matrix that 25 elements of circulation skew to the right obtain and obtain by element XOR by the unit matrix of 320 × 320.
Mother matrix extension is line number by rule is as described above M=320 × m, and columns is the matrix of N=320 × n, this matrix is exactly the check matrix H of LDPC code word, wherein M refers to the check row of check matrix, and N refers to the row of check equations, also represents the length of code word.
The process of coding is exactly first produce the long information bit sequence I=[i of N-M 1i 2i 3i n-M], the process of a remaining M check bit is then tried to achieve by the check matrix of LDPC code word.Finally obtain code word C=[i 1i 2i 3i n-Mp 1p 2p m], this code word meets C × H t=0.
It should be noted that:
Last code word C=[i 1i 2i 3i n-Mp 1p 2p m] in check bit part be in fact exactly utilize C × H t=0 this relation is tried to achieve; The order verifying column information row in H matrix is the check column that strictly correspond in mother matrix, information column, and usually to follow previous section be information column, and aft section is the structure of check column.So front N-M check bit in C correspond to front N-M information column in H, M the check bit below in C correspond to last M check column in H.
The embodiment of the present invention additionally provides a kind of deinterleaving de-mapping method of LDPC code word.As shown in Figure 2 be the schematic flow sheet of the embodiment of the deinterleaving de-mapping method of a kind of LDPC code word of the present invention.With reference to figure 2, the deinterleaving de-mapping method of LDPC code word comprises the steps:
Step S21: soft demapping process is carried out to obtain bit soft value data according to corresponding planisphere to symbol stream soft value data; Wherein said symbol stream soft value data are the symbol stream that interlace map method that receiving terminal receives LDPC code word as claimed in claim 1 obtains;
Step S22: described bit soft value data are sequentially written in memory space by row and column major order reads to obtain first time than the bit soft value data after deinterleave in this memory space, corresponding by arranging the columns write with step S12 by the columns of row;
Step S23: described first time is divided into the multiple bit soft value data sub-block of continuous print than the bit soft value data after deinterleave by predetermined length, and according to bit soft value data sub-block described in corresponding bit exchange pattern change put in order form second time than the bit soft value data after deinterleave;
Step S24: LDPC decoding process is carried out to obtain decoded bitstream data to described bit soft value data flow.
By the coding of above-mentioned LDPC, intertexture and modulation system, the thresholding of system under awgn channel can be made to reach 5.20, and the thresholding under rayleigh fading channel reaches 6.74, effectively can increase coverage rate.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection range of technical solution of the present invention.

Claims (5)

1. an interlace map method for LDPC code word, is characterized in that, comprise the steps:
By coding after LDPC code word be divided into the multiple sub-blocks of bits of continuous print by predetermined length, and according to sub-blocks of bits described in corresponding bit exchange pattern change put in order formed second time Bit Interleave after LDPC code word;
By the LDPC code word column major order write memory space after described first time Bit Interleave and by row order reads in this memory space, obtains the LDPC code word after second time Bit Interleave;
Constellation mapping is carried out to obtain symbol stream according to corresponding planisphere to the LDPC code word after described second time Bit Interleave; Wherein, described bit exchange pattern and described planisphere are corresponding with specifying the LDPC code table of code check.
2. the interlace map method of LDPC code word as claimed in claim 1, it is characterized in that, described predetermined length is 320 bits.
3. the interlace map method of LDPC code word as claimed in claim 1, is characterized in that, in described LDPC code table, the code length of LDPC code word is 19200 bits, to be 1/5 code table be code check:
Corresponding bit exchange pattern is:
Corresponding planisphere is:
Constellation point Complex symbol 0 0.53965-1.1734i 1 0.55489-1.1547i 2 0.53164-1.1869i 3 0.54537-1.1675i 4 0.4985-1.2202i 5 0.5111-1.1973i 6 0.4889-1.2357i 7 0.5045-1.2113i 8 0.53896-1.1742i 9 0.55351-1.1562i 10 0.52967-1.1878i 11 0.54639-1.1677i 12 0.4971-1.2216i 13 0.5126-1.1995i 14 0.4882-1.2371i 15 0.5045-1.2128i 16 1.1869-0.50826i 17 1.17-0.5218i 18 1.1985-0.4964i 19 1.1818-0.51294i 20 1.2209-0.4993i 21 1.2002-0.5148i 22 1.2342-0.4882i 23 1.2142-0.5052i 24 1.1876-0.50605i 25 1.1716-0.52328i 26 1.199-0.49688i 27 1.183-0.5141i 28 1.2209-0.4971i 29 1.2024-0.5148i 30 1.2349-0.4889i
31 1.215-0.5045i 32 0.27883-0.4743i 33 0.28106-0.47727i 34 0.28004-0.47176i 35 0.28157-0.47394i 36 0.28323-0.46659i 37 0.2728-0.47623i 38 0.27326-0.4706i 39 0.27153-0.47505i 40 0.27885-0.47509i 41 0.28036-0.47647i 42 0.27687-0.47317i 43 0.27919-0.47535i 44 0.28476-0.46531i 45 0.28625-0.46827i 46 0.27322-0.46991i 47 0.27474-0.4721i 48 0.47986-0.26914i 49 0.48138-0.27133i 50 0.48023-0.26569i 51 0.48096-0.26798i 52 0.46595-0.28295i 53 0.47546-0.27292i 54 0.47157-0.27279i 55 0.47429-0.27095i 56 0.47986-0.26913i 57 0.48068-0.27133i 58 0.47889-0.2681i 59 0.47961-0.27039i 60 0.48187-0.25639i 61 0.48263-0.25856i 62 0.47546-0.26595i 63 0.47697-0.26744i 64 -0.53965-1.1734i 65 -0.55489-1.1547i 66 -0.53164-1.1869i 67 -0.54537-1.1675i 68 -0.4985-1.2202i 69 -0.5111-1.1973i 70 -0.4889-1.2357i 71 -0.5045-1.2113i
72 -0.53896-1.1742i 73 -0.55351-1.1562i 74 -0.52967-1.1878i 75 -0.54639-1.1677i 76 -0.4971-1.2216i 77 -0.5126-1.1995i 78 -0.4882-1.2371i 79 -0.5045-1.2128i 80 -1.1869-0.50826i 81 -1.17-0.5218i 82 -1.1985-0.4964i 83 -1.1818-0.51294i 84 -1.2209-0.4993i 85 -1.2002-0.5148i 86 -1.2342-0.4882i 87 -1.2142-0.5052i 88 -1.1876-0.50605i 89 -1.1716-0.52328i 90 -1.199-0.49688i 91 -1.183-0.5141i 92 -1.2209-0.4971i 93 -1.2024-0.5148i 94 -1.2349-0.4889i 95 -1.215-0.5045i 96 -0.27883-0.4743i 97 -0.28106-0.47727i 98 -0.28004-0.47176i 99 -0.28157-0.47394i 100 -0.28323-0.46659i 101 -0.2728-0.47623i 102 -0.27326-0.4706i 103 -0.27153-0.47505i 104 -0.27885-0.47509i 105 -0.28036-0.47647i 106 -0.27687-0.47317i 107 -0.27919-0.47535i 108 -0.28476-0.46531i 109 -0.28625-0.46827i 110 -0.27322-0.46991i 111 -0.27474-0.4721i 112 -0.47986-0.26914i
113 -0.48138-0.27133i 114 -0.48023-0.26569i 115 -0.48096-0.26798i 116 -0.46595-0.28295i 117 -0.47546-0.27292i 118 -0.47157-0.27279i 119 -0.47429-0.27095i 120 -0.47986-0.26913i 121 -0.48068-0.27133i 122 -0.47889-0.2681i 123 -0.47961-0.27039i 124 -0.48187-0.25639i 125 -0.48263-0.25856i 126 -0.47546-0.26595i 127 -0.47697-0.26744i 128 0.53965+1.1734i 129 0.55489+1.1547i 130 0.53164+1.1869i 131 0.54537+1.1675i 132 0.4985+1.2202i 133 0.5111+1.1973i 134 0.4889+1.2357i 135 0.5045+1.2113i 136 0.53896+1.1742i 137 0.55351+1.1562i 138 0.52967+1.1878i 139 0.54639+1.1677i 140 0.4971+1.2216i 141 0.5126+1.1995i 142 0.4882+1.2371i 143 0.5045+1.2128i 144 1.1869+0.50826i 145 1.17+0.5218i 146 1.1985+0.4964i 147 1.1818+0.51294i 148 1.2209+0.4993i 149 1.2002+0.5148i 150 1.2342+0.4882i 151 1.2142+0.5052i 152 1.1876+0.50605i 153 1.1716+0.52328i
154 1.199+0.49688i 155 1.183+0.5141i 156 1.2209+0.4971i 157 1.2024+0.5148i 158 1.2349+0.4889i 159 1.215+0.5045i 160 0.27883+0.4743i 161 0.28106+0.47727i 162 0.28004+0.47176i 163 0.28157+0.47394i 164 0.28323+0.46659i 165 0.2728+0.47623i 166 0.27326+0.4706i 167 0.27153+0.47505i 168 0.27885+0.47509i 169 0.28036+0.47647i 170 0.27687+0.47317i 171 0.27919+0.47535i 172 0.28476+0.46531i 173 0.28625+0.46827i 174 0.27322+0.46991i 175 0.27474+0.4721i 176 0.47986+0.26914i 177 0.48138+0.27133i 178 0.48023+0.26569i 179 0.48096+0.26798i 180 0.46595+0.28295i 181 0.47546+0.27292i 182 0.47157+0.27279i 183 0.47429+0.27095i 184 0.47986+0.26913i 185 0.48068+0.27133i 186 0.47889+0.2681i 187 0.47961+0.27039i 188 0.48187+0.25639i 189 0.48263+0.25856i 190 0.47546+0.26595i 191 0.47697+0.26744i 192 -0.53965+1.1734i 193 -0.55489+1.1547i 194 -0.53164+1.1869i
195 -0.54537+1.1675i 196 -0.4985+1.2202i 197 -0.5111+1.1973i 198 -0.4889+1.2357i 199 -0.5045+1.2113i 200 -0.53896+1.1742i 201 -0.55351+1.1562i 202 -0.52967+1.1878i 203 -0.54639+1.1677i 204 -0.4971+1.2216i 205 -0.5126+1.1995i 206 -0.4882+1.2371i 207 -0.5045+1.2128i 208 -1.1869+0.50826i 209 -1.17+0.5218i 210 -1.1985+0.4964i 211 -1.1818+0.51294i 212 -1.2209+0.4993i 213 -1.2002+0.5148i 214 -1.2342+0.4882i 215 -1.2142+0.5052i 216 -1.1876+0.50605i 217 -1.1716+0.52328i 218 -1.199+0.49688i 219 -1.183+0.5141i 220 -1.2209+0.4971i 221 -1.2024+0.5148i 222 -1.2349+0.4889i 223 -1.215+0.5045i 224 -0.27883+0.4743i 225 -0.28106+0.47727i 226 -0.28004+0.47176i 227 -0.28157+0.47394i 228 -0.28323+0.46659i 229 -0.2728+0.47623i 230 -0.27326+0.4706i 231 -0.27153+0.47505i 232 -0.27885+0.47509i 233 -0.28036+0.47647i 234 -0.27687+0.47317i 235 -0.27919+0.47535i
236 -0.28476+0.46531i 237 -0.28625+0.46827i 238 -0.27322+0.46991i 239 -0.27474+0.4721i 240 -0.47986+0.26914i 241 -0.48138+0.27133i 242 -0.48023+0.26569i 243 -0.48096+0.26798i 244 -0.46595+0.28295i 245 -0.47546+0.27292i 246 -0.47157+0.27279i 247 -0.47429+0.27095i 248 -0.47986+0.26913i 249 -0.48068+0.27133i 250 -0.47889+0.2681i 251 -0.47961+0.27039i 252 -0.48187+0.25639i 253 -0.48263+0.25856i 254 -0.47546+0.26595i 255 -0.47697+0.26744i
4. the interlace map method of LDPC code word as claimed in claim 1, it is characterized in that, the number of described column major order is 8 row.
5. a deinterleaving de-mapping method for LDPC code word, is characterized in that, comprise the steps:
Soft demapping process is carried out to obtain bit soft value data according to corresponding planisphere to symbol stream soft value data; Wherein said symbol stream soft value data are the symbol stream that interlace map method that receiving terminal receives LDPC code word as claimed in claim 1 obtains;
Described bit soft value data are sequentially written in memory space by row and column major order reads to obtain first time than the bit soft value data after deinterleave in this memory space;
Described first time is divided into the multiple bit soft value data sub-block of continuous print than the bit soft value data after deinterleave by predetermined length, and according to bit soft value data sub-block described in corresponding bit exchange pattern change put in order form second time than the bit soft value data after deinterleave;
LDPC decoding process is carried out to obtain decoded bitstream data to described bit soft value data flow.
CN201410438349.3A 2014-08-29 2014-08-29 Interleaving and mapping method and de-interleaving and de-mapping method of LDPC code word Withdrawn CN105376012A (en)

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CN101075857A (en) * 2007-04-29 2007-11-21 中兴通讯股份有限公司 Method for generating turbo-code block intersection and HARQ packet
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