CN105450341A - LDPC codeword interleaving and mapping method and de-interleaving and de-mapping method - Google Patents

LDPC codeword interleaving and mapping method and de-interleaving and de-mapping method Download PDF

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Publication number
CN105450341A
CN105450341A CN201410438392.XA CN201410438392A CN105450341A CN 105450341 A CN105450341 A CN 105450341A CN 201410438392 A CN201410438392 A CN 201410438392A CN 105450341 A CN105450341 A CN 105450341A
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China
Prior art keywords
bit
ldpc code
code word
value data
soft value
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CN201410438392.XA
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Chinese (zh)
Inventor
张文军
杨帆
尧勇仕
史毅俊
徐胤
徐洪亮
何大治
郭序峰
赵杰
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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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Abstract

An LDPC codeword interleaving and mapping method and a de-interleaving and de-mapping method are disclosed. Included are the steps of dividing an encoded LDPC codeword into a plurality of successive bit sub-blocks according to a predetermined length, and changing the arrangement sequence of the bit sub-blocks in accordance with a corresponding bit exchange pattern to form an LDPC codeword bit-interleaved for the first time; writing the LDPC codeword bit-interleaved for the first time in accordance with a column sequence, and reading out in accordance with a row sequence to obtain an LDPC codeword bit-interleaved for the second time; and carrying out constellation mapping for the LDPC codeword bit-interleaved for the second time according to a constellation map to obtain a symbol stream. The interleaving and mapping method and the de-interleaving and de-mapping method are selected for different LDPC code tables so that the system performance can be better improved.

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: 52,552,401,213,217,515,141,723,295,641,495,339,162,511,105,059,284,546,633 054324847384443373335311840585120822573442262143619279
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, the 4th numerical value 0 implication in above-mentioned bit exchange pattern refers to and original after bit exchange, nowadays becomes the 4th sub-blocks of bits without the 1st sub-blocks of bits before bit exchange.
Corresponding planisphere is:
Constellation point Complex symbol
0 0.34754+1.7515i
1 0.28656+1.4304i
2 0.29179+1.4278i
3 0.26917+1.3269i
4 0.99361+1.4842i
5 0.81058+1.2171i
6 0.80736+1.218i
7 0.75072+1.1311i
8 0.24746+1.0293i
9 0.24032+1.0193i
10 0.24121+1.0188i
11 0.24501+1.0538i
12 0.55703+0.90026i
13 0.55591+0.89204i
14 0.55552+0.89244i
15 0.57674+0.91975i
16 1.7527+0.34593i
17 1.4301+0.28877i
18 1.4285+0.28968i
19 1.3271+0.26996i
20 1.4884+0.99159i
21 1.2198+0.80565i
22 1.2193+0.80374i
23 1.1331+0.74717i
24 1.0298+0.24546i
25 1.0174+0.23853i
26 1.0176+0.23903i
27 1.0525+0.2433i
28 0.90248+0.55343i
29 0.89312+0.55213i
30 0.89342+0.55174i
31 0.92046+0.57252i
32 0.16316+0.32843i
33 0.16386+0.32843i
34 0.16386+0.32843i
35 0.16356+0.32853i
36 0.18104+0.3274i
37 0.1805+0.3267i
38 0.18513+0.3348i
39 0.18512+0.3349i
40 0.204+0.59741i
41 0.20548+0.60676i
42 0.20577+0.60646i
43 0.21402+0.63581i
44 0.30685+0.55374i
45 0.31208+0.56123i
46 0.31179+0.56132i
47 0.32771+0.58781i
48 0.32168+0.16387i
49 0.32239+0.16377i
50 0.32239+0.16387i
51 0.32299+0.16377i
52 0.32206+0.18035i
53 0.33045+0.18456i
54 0.32256+0.18116i
55 0.33084+0.18548i
56 0.59609+0.20262i
57 0.60443+0.20341i
58 0.60404+0.20458i
59 0.63299+0.21301i
60 0.55309+0.30372i
61 0.56058+0.30894i
62 0.56038+0.30914i
63 0.58671+0.32459i
64 -0.34754+1.7515i
65 -0.28656+1.4304i
66 -0.29179+1.4278i
67 -0.26917+1.3269i
68 -0.99361+1.4842i
69 -0.81058+1.2171i
70 -0.80736+1.218i
71 -0.75072+1.1311i
72 -0.24746+1.0293i
73 -0.24032+1.0193i
74 -0.24121+1.0188i
75 -0.24501+1.0538i
76 -0.55703+0.90026i
77 -0.55591+0.89204i
78 -0.55552+0.89244i
79 -0.57674+0.91975i
80 -1.7527+0.34593i
81 -1.4301+0.28877i
82 -1.4285+0.28968i
83 -1.3271+0.26996i
84 -1.4884+0.99159i
85 -1.2198+0.80565i
86 -1.2193+0.80374i
87 -1.1331+0.74717i
88 -1.0298+0.24546i
89 -1.0174+0.23853i
90 -1.0176+0.23903i
91 -1.0525+0.2433i
92 -0.90248+0.55343i
93 -0.89312+0.55213i
94 -0.89342+0.55174i
95 -0.92046+0.57252i
96 -0.16316+0.32843i
97 -0.16386+0.32843i
98 -0.16386+0.32843i
99 -0.16356+0.32853i
100 -0.18104+0.3274i
101 -0.1805+0.3267i
102 -0.18513+0.3348i
103 -0.18512+0.3349i
104 -0.204+0.59741i
105 -0.20548+0.60676i
106 -0.20577+0.60646i
107 -0.21402+0.63581i
108 -0.30685+0.55374i
109 -0.31208+0.56123i
110 -0.31179+0.56132i
111 -0.32771+0.58781i
112 -0.32168+0.16387i
113 -0.32239+0.16377i
114 -0.32239+0.16387i
115 -0.32299+0.16377i
116 -0.32206+0.18035i
117 -0.33045+0.18456i
118 -0.32256+0.18116i
119 -0.33084+0.18548i
120 -0.59609+0.20262i
121 -0.60443+0.20341i
122 -0.60404+0.20458i
123 -0.63299+0.21301i
124 -0.55309+0.30372i
125 -0.56058+0.30894i
126 -0.56038+0.30914i
127 -0.58671+0.32459i
128 0.34754-1.7515i
129 0.28656-1.4304i
130 0.29179-1.4278i
131 0.26917-1.3269i
132 0.99361-1.4842i
133 0.81058-1.2171i
134 0.80736-1.218i
135 0.75072-1.1311i
136 0.24746-1.0293i
137 0.24032-1.0193i
138 0.24121-1.0188i
139 0.24501-1.0538i
140 0.55703-0.90026i
141 0.55591-0.89204i
142 0.55552-0.89244i
143 0.57674-0.91975i
144 1.7527-0.34593i
145 1.4301-0.28877i
146 1.4285-0.28968i
147 1.3271-0.26996i
148 1.4884-0.99159i
149 1.2198-0.80565i
150 1.2193-0.80374i
151 1.1331-0.74717i
152 1.0298-0.24546i
153 1.0174-0.23853i
154 1.0176-0.23903i
155 1.0525-0.2433i
156 0.90248-0.55343i
157 0.89312-0.55213i
158 0.89342-0.55174i
159 0.92046-0.57252i
160 0.16316-0.32843i
161 0.16386-0.32843i
162 0.16386-0.32843i
163 0.16356-0.32853i
164 0.18104-0.3274i
165 0.1805-0.3267i
166 0.18513-0.3348i
167 0.18512-0.3349i
168 0.204-0.59741i
169 0.20548-0.60676i
170 0.20577-0.60646i
171 0.21402-0.63581i
172 0.30685-0.55374i
173 0.31208-0.56123i
174 0.31179-0.56132i
175 0.32771-0.58781i
176 0.32168-0.16387i
177 0.32239-0.16377i
178 0.32239-0.16387i
179 0.32299-0.16377i
180 0.32206-0.18035i
181 0.33045-0.18456i
182 0.32256-0.18116i
183 0.33084-0.18548i
184 0.59609-0.20262i
185 0.60443-0.20341i
186 0.60404-0.20458i
187 0.63299-0.21301i
188 0.55309-0.30372i
189 0.56058-0.30894i
190 0.56038-0.30914i
191 0.58671-0.32459i
192 -0.34754-1.7515i
193 -0.28656-1.4304i
194 -0.29179-1.4278i
195 -0.26917-1.3269i
196 -0.99361-1.4842i
197 -0.81058-1.2171i
198 -0.80736-1.218i
199 -0.75072-1.1311i
200 -0.24746-1.0293i
201 -0.24032-1.0193i
202 -0.24121-1.0188i
203 -0.24501-1.0538i
204 -0.55703-0.90026i
205 -0.55591-0.89204i
206 -0.55552-0.89244i
207 -0.57674-0.91975i
208 -1.7527-0.34593i
209 -1.4301-0.28877i
210 -1.4285-0.28968i
211 -1.3271-0.26996i
212 -1.4884-0.99159i
213 -1.2198-0.80565i
214 -1.2193-0.80374i
215 -1.1331-0.74717i
216 -1.0298-0.24546i
217 -1.0174-0.23853i
218 -1.0176-0.23903i
219 -1.0525-0.2433i
220 -0.90248-0.55343i
221 -0.89312-0.55213i
222 -0.89342-0.55174i
223 -0.92046-0.57252i
224 -0.16316-0.32843i
225 -0.16386-0.32843i
226 -0.16386-0.32843i
227 -0.16356-0.32853i
228 -0.18104-0.3274i
229 -0.1805-0.3267i
230 -0.18513-0.3348i
231 -0.18512-0.3349i
232 -0.204-0.59741i
233 -0.20548-0.60676i
234 -0.20577-0.60646i
235 -0.21402-0.63581i
236 -0.30685-0.55374i
237 -0.31208-0.56123i
238 -0.31179-0.56132i
239 -0.32771-0.58781i
240 -0.32168-0.16387i
241 -0.32239-0.16377i
242 -0.32239-0.16387i
243 -0.32299-0.16377i
244 -0.32206-0.18035i
245 -0.33045-0.18456i
246 -0.32256-0.18116i
247 -0.33084-0.18548i
248 -0.59609-0.20262i
249 -0.60443-0.20341i
250 -0.60404-0.20458i
251 -0.63299-0.21301i
252 -0.55309-0.30372i
253 -0.56058-0.30894i
254 -0.56038-0.30914i
255 -0.58671-0.32459i
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 0.55591+0.89204i in 256QAM planisphere, this constellation point being shown as on real number axis and axis of imaginaries, real number axis 0.55591, axis of imaginaries 0.89204.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 1/3N ldpc=19200, L × L=320 × 320, M=12800
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=201, this digitized representation matrix of 320 × 320, this matrix to be produced by 201 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, in table 1 p 01 = 84 188 , Representing this matrix is by arranging matrix that 84 elements of circulation skew to the right obtain with the unit matrix by 320 × 320 by the matrix arranging matrix that 188 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 3... i 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 3... i n-Mp 1p 2... p m], this code word meets C × H t=0.
It should be noted that:
Last code word C=[i 1i 2i 3... i n-Mp 1p 2... p 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 8.92, and the thresholding under rayleigh fading channel reaches 11.04, 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 intertexture shooting 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 1/3 code table be code check:
Corresponding bit exchange pattern is: 52,552,401,213,217,515,141,723,295,641,495,339,162,511,105,059,284,546,633 054324847384443373335311840585120822573442262143619279
Corresponding planisphere is:
Constellation point Complex symbol 0 0.34754+1.7515i 1 0.28656+1.4304i 2 0.29179+1.4278i 3 0.26917+1.3269i 4 0.99361+1.4842i 5 0.81058+1.2171i 6 0.80736+1.218i 7 0.75072+1.1311i 8 0.24746+1.0293i 9 0.24032+1.0193i 10 0.24121+1.0188i 11 0.24501+1.0538i 12 0.55703+0.90026i 13 0.55591+0.89204i 14 0.55552+0.89244i 15 0.57674+0.91975i 16 1.7527+0.34593i 17 1.4301+0.28877i 18 1.4285+0.28968i 19 1.3271+0.26996i 20 1.4884+0.99159i 21 1.2198+0.80565i 22 1.2193+0.80374i 23 1.1331+0.74717i 24 1.0298+0.24546i 25 1.0174+0.23853i 26 1.0176+0.23903i 27 1.0525+0.2433i 28 0.90248+0.55343i 29 0.89312+0.55213i 30 0.89342+0.55174i 31 0.92046+0.57252i 32 0.16316+0.32843i 33 0.16386+0.32843i 34 0.16386+0.32843i 35 0.16356+0.32853i 36 0.18104+0.3274i 37 0.1805+0.3267i 38 0.18513+0.3348i
39 0.18512+0.3349i 40 0.204+0.59741i 41 0.20548+0.60676i 42 0.20577+0.60646i 43 0.21402+0.63581i 44 0.30685+0.55374i 45 0.31208+0.56123i 46 0.31179+0.56132i 47 0.32771+0.58781i 48 0.32168+0.16387i 49 0.32239+0.16377i 50 0.32239+0.16387i 51 0.32299+0.16377i 52 0.32206+0.18035i 53 0.33045+0.18456i 54 0.32256+0.18116i 55 0.33084+0.18548i 56 0.59609+0.20262i 57 0.60443+0.20341i 58 0.60404+0.20458i 59 0.63299+0.21301i 60 0.55309+0.30372i 61 0.56058+0.30894i 62 0.56038+0.30914i 63 0.58671+0.32459i 64 -0.34754+1.7515i 65 -0.28656+1.4304i 66 -0.29179+1.4278i 67 -0.26917+1.3269i 68 -0.99361+1.4842i 69 -0.81058+1.2171i 70 -0.80736+1.218i 71 -0.75072+1.1311i 72 -0.24746+1.0293i 73 -0.24032+1.0193i 74 -0.24121+1.0188i 75 -0.24501+1.0538i 76 -0.55703+0.90026i 77 -0.55591+0.89204i 78 -0.55552+0.89244i 79 -0.57674+0.91975i
80 -1.7527+0.34593i 81 -1.4301+0.28877i 82 -1.4285+0.28968i 83 -1.3271+0.26996i 84 -1.4884+0.99159i 85 -1.2198+0.80565i 86 -1.2193+0.80374i 87 -1.1331+0.74717i 88 -1.0298+0.24546i 89 -1.0174+0.23853i 90 -1.0176+0.23903i 91 -1.0525+0.2433i 92 -0.90248+0.55343i 93 -0.89312+0.55213i 94 -0.89342+0.55174i 95 -0.92046+0.57252i 96 -0.16316+0.32843i 97 -0.16386+0.32843i 98 -0.16386+0.32843i 99 -0.16356+0.32853i 100 -0.18104+0.3274i 101 -0.1805+0.3267i 102 -0.18513+0.3348i 103 -0.18512+0.3349i 104 -0.204+0.59741i 105 -0.20548+0.60676i 106 -0.20577+0.60646i 107 -0.21402+0.63581i 108 -0.30685+0.55374i 109 -0.31208+0.56123i 110 -0.31179+0.56132i 111 -0.32771+0.58781i 112 -0.32168+0.16387i 113 -0.32239+0.16377i 114 -0.32239+0.16387i 115 -0.32299+0.16377i 116 -0.32206+0.18035i 117 -0.33045+0.18456i 118 -0.32256+0.18116i 119 -0.33084+0.18548i 120 -0.59609+0.20262i
121 -0.60443+0.20341i 122 -0.60404+0.20458i 123 -0.63299+0.21301i 124 -0.55309+0.30372i 125 -0.56058+0.30894i 126 -0.56038+0.30914i 127 -0.58671+0.32459i 128 0.34754-1.7515i 129 0.28656-1.4304i 130 0.29179-1.4278i 131 0.26917-1.3269i 132 0.99361-1.4842i 133 0.81058-1.2171i 134 0.80736-1.218i 135 0.75072-1.1311i 136 0.24746-1.0293i 137 0.24032-1.0193i 138 0.24121-1.0188i 139 0.24501-1.0538i 140 0.55703-0.90026i 141 0.55591-0.89204i 142 0.55552-0.89244i 143 0.57674-0.91975i 144 1.7527-0.34593i 145 1.4301-0.28877i 146 1.4285-0.28968i 147 1.3271-0.26996i 148 1.4884-0.99159i 149 1.2198-0.80565i 150 1.2193-0.80374i 151 1.1331-0.74717i 152 1.0298-0.24546i 153 1.0174-0.23853i 154 1.0176-0.23903i 155 1.0525-0.2433i 156 0.90248-0.55343i 157 0.89312-0.55213i 158 0.89342-0.55174i 159 0.92046-0.57252i 160 0.16316-0.32843i 161 0.16386-0.32843i
162 0.16386-0.32843i 163 0.16356-0.32853i 164 0.18104-0.3274i 165 0.1805-0.3267i 166 0.18513-0.3348i 167 0.18512-0.3349i 168 0.204-0.59741i 169 0.20548-0.60676i 170 0.20577-0.60646i 171 0.21402-0.63581i 172 0.30685-0.55374i 173 0.31208-0.56123i 174 0.31179-0.56132i 175 0.32771-0.58781i 176 0.32168-0.16387i 177 0.32239-0.16377i 178 0.32239-0.16387i 179 0.32299-0.16377i 180 0.32206-0.18035i 181 0.33045-0.18456i 182 0.32256-0.18116i 183 0.33084-0.18548i 184 0.59609-0.20262i 185 0.60443-0.20341i 186 0.60404-0.20458i 187 0.63299-0.21301i 188 0.55309-0.30372i 189 0.56058-0.30894i 190 0.56038-0.30914i 191 0.58671-0.32459i 192 -0.34754-1.7515i 193 -0.28656-1.4304i 194 -0.29179-1.4278i 195 -0.26917-1.3269i 196 -0.99361-1.4842i 197 -0.81058-1.2171i 198 -0.80736-1.218i 199 -0.75072-1.1311i 200 -0.24746-1.0293i 201 -0.24032-1.0193i 202 -0.24121-1.0188i
203 -0.24501-1.0538i 204 -0.55703-0.90026i 205 -0.55591-0.89204i 206 -0.55552-0.89244i 207 -0.57674-0.91975i 208 -1.7527-0.34593i 209 -1.4301-0.28877i 210 -1.4285-0.28968i 211 -1.3271-0.26996i 212 -1.4884-0.99159i 213 -1.2198-0.80565i 214 -1.2193-0.80374i 215 -1.1331-0.74717i 216 -1.0298-0.24546i 217 -1.0174-0.23853i 218 -1.0176-0.23903i 219 -1.0525-0.2433i 220 -0.90248-0.55343i 221 -0.89312-0.55213i 222 -0.89342-0.55174i 223 -0.92046-0.57252i 224 -0.16316-0.32843i 225 -0.16386-0.32843i 226 -0.16386-0.32843i 227 -0.16356-0.32853i 228 -0.18104-0.3274i 229 -0.1805-0.3267i 230 -0.18513-0.3348i 231 -0.18512-0.3349i 232 -0.204-0.59741i 233 -0.20548-0.60676i 234 -0.20577-0.60646i 235 -0.21402-0.63581i 236 -0.30685-0.55374i 237 -0.31208-0.56123i 238 -0.31179-0.56132i 239 -0.32771-0.58781i 240 -0.32168-0.16387i 241 -0.32239-0.16377i 242 -0.32239-0.16387i 243 -0.32299-0.16377i
244 -0.32206-0.18035i 245 -0.33045-0.18456i 246 -0.32256-0.18116i 247 -0.33084-0.18548i 248 -0.59609-0.20262i 249 -0.60443-0.20341i 250 -0.60404-0.20458i 251 -0.63299-0.21301i 252 -0.55309-0.30372i 253 -0.56058-0.30894i 254 -0.56038-0.30914i 255 -0.58671-0.32459i
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.
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