CN104935397A - Ldpc码字的交织映射方法及解交织解映射方法 - Google Patents

Ldpc码字的交织映射方法及解交织解映射方法 Download PDF

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CN104935397A
CN104935397A CN201410106461.7A CN201410106461A CN104935397A CN 104935397 A CN104935397 A CN 104935397A CN 201410106461 A CN201410106461 A CN 201410106461A CN 104935397 A CN104935397 A CN 104935397A
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value data
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ldpc code
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张文军
徐胤
何大治
管云峰
史毅俊
郭序峰
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Shanghai National Engineering Research Center for Nanotechnology Co Ltd
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

一种LDPC码字的交织映射方法及解交织解映射方法，交织映射方法包括将LDPC码字中的校验部分分成两个校验部分；对两个校验部分进行第一次比特交织得到两个校验比特流；将信息比特部分与两个校验比特流拼接成第一次比特交织后的LDPC码字；将第一次比特交织后的LDPC码字按预定长度分成多个比特子块，按比特交换图案变换比特子块的排列顺序形成第二次比特交织后的LDPC码字；将第二次比特交织后的LDPC码字按列顺序写入并按行顺序读出得到第三次比特交织后的LDPC码字；对第三次比特交织后的LDPC码字依照星座图进行星座映射得到符号流。针对不同的LDPC码表选择交织映射和解交织解映射方法使系统性能得到更好的提升。

Description

LDPC码字的交织映射方法及解交织解映射方法
技术领域
本发明涉及数字电视技术领域，特别涉及一种LDPC码字的交织映射方法及解交织解映射方法。
背景技术
在现有的广播通信标准中，LDPC编码、比特交织和星座映射是最为常见的编码调制方式。在不同的发射系统中，LDPC编码、比特交织和星座映射都需要单独设计，并且联合调试，以取得最好的信道性能。因此，如何针对特定的LDPC码字和星座映射方式形成针对性的比特交织，是本领域的一个技术难题。
发明内容
本发明解决的问题是现有技术中无法针对特定的LDPC码字和星座映射方式形成针对性的比特交织。
为解决上述问题，本发明实施例提供了一种LDPC码字的交织映射方法，包括如下步骤：将所述LDPC码字中的校验部分分成第一校验部分和第二校验部分；分别对所述第一校验部分和所述第二校验部分进行第一次比特交织以得到第一校验比特流和第二校验比特流；将所述LDPC码字中的信息比特部分与所述第一校验比特流和第二校验比特流拼接成第一次比特交织后的LDPC码字；将所述第一次比特交织后的LDPC码字按预定长度分成连续的多个比特子块，并按照相应的比特交换图案变换所述比特子块的排列顺序以形成第二次比特交织后的LDPC码字；将所述第二次比特交织后的LDPC码字按列顺序写入存储空间并按行顺序从该存储空间内读出以得到第三次比特交织后的LDPC码字；对所述第三次比特交织后的LDPC码字依照相应的星座图进行星座映射以得到符号流；其中，所述比特交换图案和所述星座图都与不同码率的LDPC码表相对应。
本发明实施例还提供了一种LDPC码字的解交织解映射方法，包括如下步骤：对符号流软值数据依照相应的星座图进行软解映射处理以得到比特软值数据；其中所述符号流软值数据是接收端接收到上述的LDPC码字的交织映射方法得到的符号流经过快速傅里叶变换后得到；对所述比特软值数据按行顺序写入存储空间并按列顺序从该存储空间内读出以得到第一次比特解交织后的比特软值数据；将所述第一次比特解交织后的比特软值数据按预定长度分成连续的多个比特软值数据子块，并按照相应的比特交换图案变换所述比特软值数据子块的排列顺序以形成第二次比特解交织后的比特软值数据；将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的校验部分分成第一校验部分比特软值数据和第二校验部分比特软值数据；分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据进行第三次比特解交织以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据；将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的信息比特部分与所述第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据拼接成比特软值数据流；对所述比特软值数据流进行LDPC译码处理以得到解码后的比特流数据。
与现有技术相比，本发明技术方案具有以下优点：
针对不同的LDPC码表选择相应的交织映射以及解交织解映射方法以使系统性能得到更好的提升。
附图说明
图1是本发明的一种LDPC码字的交织映射方法的具体实施方式的流程示意图；
图2是本发明的一种LDPC码字的解交织解映射方法的具体实施方式的流程示意图；
图3是本发明的一种LDPC码字的交织映射方法中对第一校验部分和所述第二校验部分进行第一次比特交织以得到第一校验比特流和第二校验比特流的示意图；
图4是本发明的一种LDPC码字的交织映射方法中按照比特交换图案变换所述比特子块的排列顺序的示意图。
具体实施方式
发明人发现现有技术中，无法针对特定的LDPC码字和星座映射方式形成针对性的比特交织。
针对上述问题，发明人经过研究，提供了一种LDPC码字的交织映射方法及解交织解映射方法，针对不同的LDPC码表选择相应的交织映射以及解交织解映射方法以使系统性能得到更好的提升。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。
在本发明实施例中，发射机端为：首先将信源编码后比特流输入到LDPC编码器进行特定码率码长的LDPC码字的编码，之后输入比特交织器，按照某种特定的比特交织图案方法进行交织处理，随后将比特交织处理后的数据进行对应码率的1024NUC星座映射，星座映射，之后进行调制，发射，经历信道。接收机端为：将经过信道后的数据进行解调，然后解调后的数据输入解映射模块，进行QPSK解映射。之后将解映射模块输出的比特软值信息输入到解交织模块进行解交织，之后输出到LDPC译码器，对其进行基于特定的LDPC码字的译码，最后解码输出比特流。
如图1所示的是本发明的一种LDPC码字的交织映射方法的具体实施方式的流程示意图。参考图1，LDPC码字的交织映射方法包括如下步骤：
步骤S11：将所述LDPC码字中的校验部分分成第一校验部分和第二校验部分；
步骤S12：分别对所述第一校验部分和所述第二校验部分进行第一次比特交织以得到第一校验比特流和第二校验比特流；
步骤S13：将所述LDPC码字中的信息比特部分与所述第一校验比特流和第二校验比特流拼接成第一次比特交织后的LDPC码字；
步骤S14：将所述第一次比特交织后的LDPC码字按预定长度分成连续的多个比特子块，并按照相应的比特交换图案变换所述比特子块的排列顺序以形成第二次比特交织后的LDPC码字；
步骤S15：将所述第二次比特交织后的LDPC码字按列顺序写入存储空间并按行顺序从该存储空间内读出以得到第三次比特交织后的LDPC码字；
步骤S16：对所述第三次比特交织后的LDPC码字依照相应的星座图进行星座映射以得到符号流；其中，所述比特交换图案和所述星座图都与不同码率的LDPC码表相对应。
在本实施例中，所述步骤S12具体包括如下步骤：分别对所述第一校验部分和所述第二校验部分按列顺序写入存储空间并按行顺序从该存储空间内读出以得到第一校验比特流和第二校验比特流。
具体地，对生成LDPC码字的检验部分进行比特交织：其中，LDPC码字的校验部分共（M1+M2）个比特，第一部分M1个比特，按列写到一个存储空间内，每列Q1个比特，共q列，也就是说M1=Q1*q，接着按行顺序读出；第二部分M2个比特，按列写到一个存储空间内，每列Q2个比特，共q列，也就是说M2=Q2*q，接着按行顺序读出。其具体实施过程参考图3所示。
在所述步骤S14中，将所述第一次比特交织后的LDPC码字按预定长度分成连续的多个比特子块，其中所述预定长度为360。进一步地，按照相应的比特交换图案变换所述比特子块的排列顺序以形成第二次比特交织后的LDPC码字。其具体过程详见图4所示，在图4中，(m0,m1,...,mN/360-1)是360长度比特子块的比特交换图案。
具体地，在本实施例中，LDPC码表中的LDPC码字的码长为64800。针对不同码率的LDPC码字，提供不同的比特交换图案。
1）码率为5/15
相应的比特交换图案为：
需要说明的是，在本实施例中，所述比特交换图案中的各个数值是指未经过比特交换前所述比特子块的位置。例如，上述比特交换图案中的第一个数值97含义是指原来未经过比特交换前第98个比特子块的如今经过比特交换后变成了第一个比特子块。
相应的星座图为：
星座点 星座符号
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1 1.4882+1.2169i
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5 1.4882+1.0024i
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888 -0.7063-0.3544i
889 -0.7063-0.3543i
890 -0.7085-0.3544i
891 -0.7085-0.3543i
892 -0.7063-0.3470i
893 -0.7063-0.3470i
894 -0.7085-0.3470i
895 -0.7085-0.3470i
896 -0.1425-1.4882i
897 -0.1425-1.2169i
898 -0.1425-1.4882i
899 -0.1425-1.2169i
900 -0.1425-0.9581i
901 -0.1425-1.0024i
902 -0.1425-0.9581i
903 -0.1425-1.0024i
904 -0.1413-1.4882i
905 -0.1413-1.2169i
906 -0.1413-1.4882i
907 -0.1413-1.2169i
908 -0.1413-0.9581i
909 -0.1413-1.0024i
910 -0.1413-0.9581i
911 -0.1413-1.0024i
912 -0.1425-0.6353i
913 -0.1425-0.6363i
914 -0.1425-0.6353i
915 -0.1425-0.6363i
916 -0.1425-0.7063i
917 -0.1425-0.7085i
918 -0.1425-0.7063i
919 -0.1425-0.7085i
920 -0.1413-0.6353i
921 -0.1413-0.6363i
922 -0.1413-0.6353i
923 -0.1413-0.6363i
924 -0.1413-0.7063i
925 -0.1413-0.7085i
926 -0.1413-0.7063i
927 -0.1413-0.7085i
928 -0.3544-1.4882i
929 -0.3544-1.2169i
930 -0.3543-1.4882i
931 -0.3543-1.2169i
932 -0.3544-0.9581i
933 -0.3544-1.0024i
934 -0.3543-0.9581i
935 -0.3543-1.0024i
936 -0.3470-1.4882i
937 -0.3470-1.2169i
938 -0.3470-1.4882i
939 -0.3470-1.2169i
940 -0.3470-0.9581i
941 -0.3470-1.0024i
942 -0.3470-0.9581i
943 -0.3470-1.0024i
944 -0.3544-0.6353i
945 -0.3544-0.6363i
946 -0.3543-0.6353i
947 -0.3543-0.6363i
948 -0.3544-0.7063i
949 -0.3544-0.7085i
950 -0.3543-0.7063i
951 -0.3543-0.7085i
952 -0.3470-0.6353i
953 -0.3470-0.6363i
954 -0.3470-0.6353i
955 -0.3470-0.6363i
956 -0.3470-0.7063i
957 -0.3470-0.7085i
958 -0.3470-0.7063i
959 -0.3470-0.7085i
960 -0.1425-0.1425i
961 -0.1425-0.1425i
962 -0.1425-0.1425i
963 -0.1425-0.1425i
964 -0.1425-0.1413i
965 -0.1425-0.1413i
966 -0.1425-0.1413i
967 -0.1425-0.1413i
968 -0.1413-0.1425i
969 -0.1413-0.1425i
970 -0.1413-0.1425i
971 -0.1413-0.1425i
972 -0.1413-0.1413i
973 -0.1413-0.1413i
974 -0.1413-0.1413i
975 -0.1413-0.1413i
976 -0.1425-0.3544i
977 -0.1425-0.3543i
978 -0.1425-0.3544i
979 -0.1425-0.3543i
980 -0.1425-0.3470i
981 -0.1425-0.3470i
982 -0.1425-0.3470i
983 -0.1425-0.3470i
984 -0.1413-0.3544i
985 -0.1413-0.3543i
986 -0.1413-0.3544i
987 -0.1413-0.3543i
988 -0.1413-0.3470i
989 -0.1413-0.3470i
990 -0.1413-0.3470i
991 -0.1413-0.3470i
992 -0.3544-0.1425i
993 -0.3544-0.1425i
994 -0.3543-0.1425i
995 -0.3543-0.1425i
996 -0.3544-0.1413i
997 -0.3544-0.1413i
998 -0.3543-0.1413i
999 -0.3543-0.1413i
1000 -0.3470-0.1425i
1001 -0.3470-0.1425i
1002 -0.3470-0.1425i
1003 -0.3470-0.1425i
1004 -0.3470-0.1413i
1005 -0.3470-0.1413i
1006 -0.3470-0.1413i
1007 -0.3470-0.1413i
1008 -0.3544-0.3544i
1009 -0.3544-0.3543i
1010 -0.3543-0.3544i
1011 -0.3543-0.3543i
1012 -0.3544-0.3470i
1013 -0.3544-0.3470i
1014 -0.3543-0.3470i
1015 -0.3543-0.3470i
1016 -0.3470-0.3544i
1017 -0.3470-0.3543i
1018 -0.3470-0.3544i
1019 -0.3470-0.3543i
1020 -0.3470-0.3470i
1021 -0.3470-0.3470i
1022 -0.3470-0.3470i
1023 -0.3470-0.3470i
5）码率为7/15
相应的比特交换图案为：
相应的星座图为：
星座点 星座符号
0 1.5177+1.5177i
1 1.5177+1.2375i
2 1.2375+1.5177i
3 1.2375+1.2375i
4 1.5177+0.9252i
5 1.5177+1.0200i
6 1.2375+0.9252i
7 1.2375+1.0200i
8 0.9252+1.5177i
9 0.9252+1.2375i
10 1.0200+1.5177i
11 1.0200+1.2375i
12 0.9252+0.9252i
13 0.9252+1.0200i
14 1.0200+0.9252i
15 1.0200+1.0200i
16 1.5177+0.5833i
17 1.5177+0.5803i
18 1.2375+0.5833i
19 1.2375+0.5803i
20 1.5177+0.7327i
21 1.5177+0.7094i
22 1.2375+0.7327i
23 1.2375+0.7094i
24 0.9252+0.5833i
25 0.9252+0.5803i
26 1.0200+0.5833i
27 1.0200+0.5803i
28 0.9252+0.7327i
29 0.9252+0.7094i
30 1.0200+0.7327i
31 1.0200+0.7094i
32 0.5833+1.5177i
33 0.5833+1.2375i
34 0.5803+1.5177i
35 0.5803+1.2375i
36 0.5833+0.9252i
37 0.5833+1.0200i
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40 0.7327+1.5177i
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52 0.5833+0.7327i
53 0.5833+0.7094i
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63 0.7094+0.7094i
64 1.5177+0.1056i
65 1.5177+0.1052i
66 1.2375+0.1056i
67 1.2375+0.1052i
68 1.5177+0.1263i
69 1.5177+0.1260i
70 1.2375+0.1263i
71 1.2375+0.1260i
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81 1.5177+0.3842i
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84 1.5177+0.3188i
85 1.5177+0.3200i
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87 1.2375+0.3200i
88 0.9252+0.3821i
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90 1.0200+0.3821i
91 1.0200+0.3842i
92 0.9252+0.3188i
93 0.9252+0.3200i
94 1.0200+0.3188i
95 1.0200+0.3200i
96 0.5833+0.1056i
97 0.5833+0.1052i
98 0.5803+0.1056i
99 0.5803+0.1052i
100 0.5833+0.1263i
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139 0.1260+1.2375i
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157 0.1263+0.7094i
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195 0.1052+0.1052i
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213 0.1056+0.3200i
214 0.1052+0.3188i
215 0.1052+0.3200i
216 0.1263+0.3821i
217 0.1263+0.3842i
218 0.1260+0.3821i
219 0.1260+0.3842i
220 0.1263+0.3188i
221 0.1263+0.3200i
222 0.1260+0.3188i
223 0.1260+0.3200i
224 0.3821+0.1056i
225 0.3821+0.1052i
226 0.3842+0.1056i
227 0.3842+0.1052i
228 0.3821+0.1263i
229 0.3821+0.1260i
230 0.3842+0.1263i
231 0.3842+0.1260i
232 0.3188+0.1056i
233 0.3188+0.1052i
234 0.3200+0.1056i
235 0.3200+0.1052i
236 0.3188+0.1263i
237 0.3188+0.1260i
238 0.3200+0.1263i
239 0.3200+0.1260i
240 0.3821+0.3821i
241 0.3821+0.3842i
242 0.3842+0.3821i
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244 0.3821+0.3188i
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254 0.3200+0.3188i
255 0.3200+0.3200i
256 1.5177-1.5177i
257 1.5177-1.2375i
258 1.2375-1.5177i
259 1.2375-1.2375i
260 1.5177-0.9252i
261 1.5177-1.0200i
262 1.2375-0.9252i
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266 1.0200-1.5177i
267 1.0200-1.2375i
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270 1.0200-0.9252i
271 1.0200-1.0200i
272 1.5177-0.5833i
273 1.5177-0.5803i
274 1.2375-0.5833i
275 1.2375-0.5803i
276 1.5177-0.7327i
277 1.5177-0.7094i
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279 1.2375-0.7094i
280 0.9252-0.5833i
281 0.9252-0.5803i
282 1.0200-0.5833i
283 1.0200-0.5803i
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286 1.0200-0.7327i
287 1.0200-0.7094i
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316 0.7327-0.7327i
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318 0.7094-0.7327i
319 0.7094-0.7094i
320 1.5177-0.1056i
321 1.5177-0.1052i
322 1.2375-0.1056i
323 1.2375-0.1052i
324 1.5177-0.1263i
325 1.5177-0.1260i
326 1.2375-0.1263i
327 1.2375-0.1260i
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330 1.0200-0.1056i
331 1.0200-0.1052i
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334 1.0200-0.1263i
335 1.0200-0.1260i
336 1.5177-0.3821i
337 1.5177-0.3842i
338 1.2375-0.3821i
339 1.2375-0.3842i
340 1.5177-0.3188i
341 1.5177-0.3200i
342 1.2375-0.3188i
343 1.2375-0.3200i
344 0.9252-0.3821i
345 0.9252-0.3842i
346 1.0200-0.3821i
347 1.0200-0.3842i
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349 0.9252-0.3200i
350 1.0200-0.3188i
351 1.0200-0.3200i
352 0.5833-0.1056i
353 0.5833-0.1052i
354 0.5803-0.1056i
355 0.5803-0.1052i
356 0.5833-0.1263i
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411 0.1260-0.5803i
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在所述步骤S15中，例如，对于码长为64800比特的LDPC码字（经第二次比特交织后的LDPC码字），按列顺序写入存储空间并按行顺序从该存储空间内读出，其中每列6480比特，共10列。
之后对上述比特交织后的比特流数据(b0,b1,...,bN-1)，根据1024NUC星座图，每十个二进制比特序列所对应的十进制数映射到某一个星座点，得到符号流（每个复数符号对应一个星座点）。以5/15码率为例，输入的十个比特‘0000001100’对应十进制数为12，则对应到表1中5/15码率的0.9581+0.9581i的星座点，该星座点在实数轴和虚数轴上的显示为，实数轴0.9581、虚数轴0.9581。然后在调制模块对符号流进行OFDM操作，加入载波进行发射。
在本实施例中，所述LDPC码字是对信源编码后的比特流经特定的LDPC编码后得到，其中所述特定的LDPC编码可以采用现有技术来实现。
具体地，特定LDPC码字为两个中的一个，该两个LDPC的码字是以L×L（Ｌ通常为360）为子块大小，码表分别为如下：
表1码率5/15码长64800的码表
表2码率7/15码长64800的码表
其编码方法如下：
将信源编码后的比特流，拆分为一个个信息块，每个信息块由Ｋ个信息比特组成，表示为S＝(s0,s1,...,sK-1)。按图1中的特定ＬＤＰＣ编码，是要根据S＝(s0,s1,...,sK-1)生成M1+M2个校验比特即得到Ｎ个比特的码字Λ＝(λ0,λ1,...,λN-1)，其中N＝K+M1+M2。Λ又可以表示为，
编码的步骤为：
1）初始化λi＝si，i＝0,1,...,K-1。pj＝0，j＝0,1,...,M1+M2-1
2）对信息比特λ0，对以码表中的第一行数字为地址的校验比特进行累加，举表2码率7/15，码长64800的码表为例：
由于其第一行数字为：
460 792 1007 4580 11452 13130 26882 27020 32439
p 460 = p 460 ⊕ λ 0 , p 792 = p 792 ⊕ λ 0 , p 1007 = p 1007 ⊕ λ 0 , p 4580 = p 4580 ⊕ λ 0 , p 11452 = p 11452 ⊕ λ 0 , p 13130 = p 13130 ⊕ λ 0 , p 26882 = p 26882 ⊕ λ 0 , p 27020 = p 27020 ⊕ λ 0 , p 32439 = p 32439 ⊕ λ 0
3）对于接下来的L-1个信息比特，（通常L＝360），将每个信息比特分别与按照如下ｙ为地址的校验比特进行累加：
y = ( x + m &times; Q 1 ) mod M 1 , ifx < M 1 M 1 + { ( x - M 1 + m &times; Q 2 ) mod M 2 } ifx &GreaterEqual; M 2
其中，x是指与λ0相关的校验位地址，举表2为例，x即码表中第一行的数字460 792 1007 4580 11452 13130 26882 27020 32439。而 Q 1 = M 1 L , Q 2 = M 2 L .
举表2的码字为例子，
Q 1 = M 1 L = 1080 360 = 3 , Q 2 = M 2 L = 33480 360 = 93 .
p 463 = p 463 &CirclePlus; &lambda; 1 , p 795 = p 795 &CirclePlus; &lambda; 1 , p 1010 = p 1010 &CirclePlus; &lambda; 1 , p 4673 = p 4673 &CirclePlus; &lambda; 1 , p 11545 = p 11545 &CirclePlus; &lambda; 0 , p 13223 = p 13223 &CirclePlus; &lambda; 1 , p 26975 = p 26975 &CirclePlus; &lambda; 1 , p 27113 = p 27113 &CirclePlus; &lambda; 1 , p 32532 = p 32532 &CirclePlus; &lambda; 1
4）对于第L个信息比特λL，按照码表中的第二行数字地址对校验比特进行累加。同样的对于接下来的L-1个信息比特，继续按照步骤3）中的公式对校验比特进行累加，这时候步骤三种的公式的x即码表中第二行的数字。
5）同理，对于第2L、3L、4L…iL…个信息比特，按照码表中分别第3、4、5、…、(i+1)L….行的地址对校验比特进行累加，而其信息比特之后的L-1个信息比特则分别按照步骤3）中的公式对校验比特进行累加，注意这时候步骤三种的公式的x对应的是当前第iL个信息比特所对应的码表中的行，比如第iL个信息比特之后的L-1个比特，其应用步骤3）中的公式的时候对应的x的地址为码表中的第(i+1)行。
6）做完步骤5）之后，做如下操作：
其中i=1,2,...,M1-1
本发明实施例还提供了一种LDPC码字的解交织解映射方法。如图2所示的是本发明的一种LDPC码字的解交织解映射方法的具体实施方式的流程示意图。参考图2，LDPC码字的解交织解映射方法包括如下步骤：
步骤S21：对符号流软值数据依照相应的星座图进行软解映射处理以得到比特软值数据；其中所述符号流软值数据是接收端接收到上述LDPC码字的交织映射方法得到的符号流经过快速傅里叶变换后得到；
步骤S22：对所述比特软值数据按行顺序写入存储空间并按列顺序从该存储空间内读出以得到第一次比特解交织后的比特软值数据；
步骤S23：将所述第一次比特解交织后的比特软值数据按预定长度分成连续的多个比特软值数据子块，并按照相应的比特交换图案变换所述比特软值数据子块的排列顺序以形成第二次比特解交织后的比特软值数据；
步骤S24：将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的校验部分分成第一校验部分比特软值数据和第二校验部分比特软值数据；
步骤S25：分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据进行第三次比特解交织以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据；
步骤S26：将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的信息比特部分与所述第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据拼接成比特软值数据流；
步骤S27：对所述比特软值数据流进行LDPC译码处理以得到解码后的比特流数据。
在本实施例中，所述步骤S25具体包括：分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据按行顺序写入存储空间并按列顺序从该存储空间内读出以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据。
本发明虽然已以较佳实施例公开如上，但其并不是用来限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，都可以利用上述揭示的方法和技术内容对本发明技术方案做出可能的变动和修改，因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化及修饰，均属于本发明技术方案的保护范围。

Claims (7)

1.一种LDPC码字的交织映射方法，其特征在于，包括如下步骤：
将所述LDPC码字中的校验部分分成第一校验部分和第二校验部分；
分别对所述第一校验部分和所述第二校验部分进行第一次比特交织以得到第一校验比特流和第二校验比特流；
将所述LDPC码字中的信息比特部分与所述第一校验比特流和第二校验比特流拼接成第一次比特交织后的LDPC码字；
将所述第一次比特交织后的LDPC码字按预定长度分成连续的多个比特子块，并按照相应的比特交换图案变换所述比特子块的排列顺序以形成第二次比特交织后的LDPC码字；
将所述第二次比特交织后的LDPC码字按列顺序写入存储空间并按行顺序从该存储空间内读出以得到第三次比特交织后的LDPC码字；
对所述第三次比特交织后的LDPC码字依照相应的星座图进行星座映射以得到符号流；其中，所述比特交换图案和所述星座图都与不同码率的LDPC码表相对应。
2.如权利要求1所述的LDPC码字的交织映射方法，其特征在于，所述分别对所述第一校验部分和所述第二校验部分进行第一次比特交织以得到第一校验比特流和第二校验比特流包括：
分别对所述第一校验部分和所述第二校验部分按列顺序写入存储空间并按行顺序从该存储空间内读出以得到第一校验比特流和第二校验比特流。
3.如权利要求1所述的LDPC码字的交织映射方法，其特征在于，所述预定长度为360比特。
4.如权利要求1所述的LDPC码字的交织映射方法，其特征在于，所述LDPC码表中LDPC码字的码长为64800比特、码率为5/15；
码表为：
相应的比特交换图案为：
相应的星座图为：
星座点 星座符号 0 1.4882+1.4882i 1 1.4882+1.2169i 2 1.2169+1.4882i 3 1.2169+1.2169i 4 1.4882+0.9581i 5 1.4882+1.0024i 6 1.2169+0.9581i 7 1.2169+1.0024i 8 0.9581+1.4882i
9 0.9581+1.2169i 10 1.0024+1.4882i 11 1.0024+1.2169i 12 0.9581+0.9581i 13 0.9581+1.0024i 14 1.0024+0.9581i 15 1.0024+1.0024i 16 1.4882+0.6353i 17 1.4882+0.6363i 18 1.2169+0.6353i 19 1.2169+0.6363i 20 1.4882+0.7063i 21 1.4882+0.7085i 22 1.2169+0.7063i 23 1.2169+0.7085i 24 0.9581+0.6353i 25 0.9581+0.6363i 26 1.0024+0.6353i 27 1.0024+0.6363i 28 0.9581+0.7063i 29 0.9581+0.7085i 30 1.0024+0.7063i
31 1.0024+0.7085i 32 0.6353+1.4882i 33 0.6353+1.2169i 34 0.6363+1.4882i 35 0.6363+1.2169i 36 0.6353+0.9581i 37 0.6353+1.0024i 38 0.6363+0.9581i 39 0.6363+1.0024i 40 0.7063+1.4882i 41 0.7063+1.2169i 42 0.7085+1.4882i 43 0.7085+1.2169i 44 0.7063+0.9581i 45 0.7063+1.0024i 46 0.7085+0.9581i 47 0.7085+1.0024i 48 0.6353+0.6353i 49 0.6353+0.6363i 50 0.6363+0.6353i 51 0.6363+0.6363i 52 0.6353+0.7063i
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75 1.0024+0.1425i 76 0.9581+0.1413i 77 0.9581+0.1413i 78 1.0024+0.1413i 79 1.0024+0.1413i 80 1.4882+0.3544i 81 1.4882+0.3543i 82 1.2169+0.3544i 83 1.2169+0.3543i 84 1.4882+0.3470i 85 1.4882+0.3470i 86 1.2169+0.3470i 87 1.2169+0.3470i 88 0.9581+0.3544i 89 0.9581+0.3543i 90 1.0024+0.3544i 91 1.0024+0.3543i 92 0.9581+0.3470i 93 0.9581+0.3470i 94 1.0024+0.3470i 95 1.0024+0.3470i 96 0.6353+0.1425i
97 0.6353+0.1425i 98 0.6363+0.1425i 99 0.6363+0.1425i 100 0.6353+0.1413i 101 0.6353+0.1413i 102 0.6363+0.1413i 103 0.6363+0.1413i 104 0.7063+0.1425i 105 0.7063+0.1425i 106 0.7085+0.1425i 107 0.7085+0.1425i 108 0.7063+0.1413i 109 0.7063+0.1413i 110 0.7085+0.1413i 111 0.7085+0.1413i 112 0.6353+0.3544i 113 0.6353+0.3543i 114 0.6363+0.3544i 115 0.6363+0.3543i 116 0.6353+0.3470i 117 0.6353+0.3470i 118 0.6363+0.3470i
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185 0.3470+0.6363i 186 0.3470+0.6353i 187 0.3470+0.6363i 188 0.3470+0.7063i 189 0.3470+0.7085i 190 0.3470+0.7063i 191 0.3470+0.7085i 192 0.1425+0.1425i 193 0.1425+0.1425i 194 0.1425+0.1425i 195 0.1425+0.1425i 196 0.1425+0.1413i 197 0.1425+0.1413i 198 0.1425+0.1413i 199 0.1425+0.1413i 200 0.1413+0.1425i 201 0.1413+0.1425i 202 0.1413+0.1425i 203 0.1413+0.1425i 204 0.1413+0.1413i 205 0.1413+0.1413i 206 0.1413+0.1413i
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229 0.3544+0.1413i 230 0.3543+0.1413i 231 0.3543+0.1413i 232 0.3470+0.1425i 233 0.3470+0.1425i 234 0.3470+0.1425i 235 0.3470+0.1425i 236 0.3470+0.1413i 237 0.3470+0.1413i 238 0.3470+0.1413i 239 0.3470+0.1413i 240 0.3544+0.3544i 241 0.3544+0.3543i 242 0.3543+0.3544i 243 0.3543+0.3543i 244 0.3544+0.3470i 245 0.3544+0.3470i 246 0.3543+0.3470i 247 0.3543+0.3470i 248 0.3470+0.3544i 249 0.3470+0.3543i 250 0.3470+0.3544i
251 0.3470+0.3543i 252 0.3470+0.3470i 253 0.3470+0.3470i 254 0.3470+0.3470i 255 0.3470+0.3470i 256 1.4882-1.4882i 257 1.4882-1.2169i 258 1.2169-1.4882i 259 1.2169-1.2169i 260 1.4882-0.9581i 261 1.4882-1.0024i 262 1.2169-0.9581i 263 1.2169-1.0024i 264 0.9581-1.4882i 265 0.9581-1.2169i 266 1.0024-1.4882i 267 1.0024-1.2169i 268 0.9581-0.9581i 269 0.9581-1.0024i 270 1.0024-0.9581i 271 1.0024-1.0024i 272 1.4882-0.6353i
273 1.4882-0.6363i 274 1.2169-0.6353i 275 1.2169-0.6363i 276 1.4882-0.7063i 277 1.4882-0.7085i 278 1.2169-0.7063i 279 1.2169-0.7085i 280 0.9581-0.6353i 281 0.9581-0.6363i 282 1.0024-0.6353i 283 1.0024-0.6363i 284 0.9581-0.7063i 285 0.9581-0.7085i 286 1.0024-0.7063i 287 1.0024-0.7085i 288 0.6353-1.4882i 289 0.6353-1.2169i 290 0.6363-1.4882i 291 0.6363-1.2169i 292 0.6353-0.9581i 293 0.6353-1.0024i 294 0.6363-0.9581i
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317 0.7063-0.7085i 318 0.7085-0.7063i 319 0.7085-0.7085i 320 1.4882-0.1425i 321 1.4882-0.1425i 322 1.2169-0.1425i 323 1.2169-0.1425i 324 1.4882-0.1413i 325 1.4882-0.1413i 326 1.2169-0.1413i 327 1.2169-0.1413i 328 0.9581-0.1425i 329 0.9581-0.1425i 330 1.0024-0.1425i 331 1.0024-0.1425i 332 0.9581-0.1413i 333 0.9581-0.1413i 334 1.0024-0.1413i 335 1.0024-0.1413i 336 1.4882-0.3544i 337 1.4882-0.3543i 338 1.2169-0.3544i
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1021 -0.3470-0.3470i 1022 -0.3470-0.3470i 1023 -0.3470-0.3470i
5.如权利要求1所述的LDPC码字的交织映射方法，其特征在于，所述LDPC码表中LDPC码字的码长为64800比特、码率为7/15；
码表为：
相应的比特交换图案为：
相应的星座图为：
星座点 星座符号
0 1.5177+1.5177i 1 1.5177+1.2375i 2 1.2375+1.5177i 3 1.2375+1.2375i 4 1.5177+0.9252i 5 1.5177+1.0200i 6 1.2375+0.9252i 7 1.2375+1.0200i 8 0.9252+1.5177i 9 0.9252+1.2375i 10 1.0200+1.5177i 11 1.0200+1.2375i 12 0.9252+0.9252i 13 0.9252+1.0200i 14 1.0200+0.9252i 15 1.0200+1.0200i 16 1.5177+0.5833i 17 1.5177+0.5803i 18 1.2375+0.5833i 19 1.2375+0.5803i 20 1.5177+0.7327i 21 1.5177+0.7094i
22 1.2375+0.7327i 23 1.2375+0.7094i 24 0.9252+0.5833i 25 0.9252+0.5803i 26 1.0200+0.5833i 27 1.0200+0.5803i 28 0.9252+0.7327i 29 0.9252+0.7094i 30 1.0200+0.7327i 31 1.0200+0.7094i 32 0.5833+1.5177i 33 0.5833+1.2375i 34 0.5803+1.5177i 35 0.5803+1.2375i 36 0.5833+0.9252i 37 0.5833+1.0200i 38 0.5803+0.9252i 39 0.5803+1.0200i 40 0.7327+1.5177i 41 0.7327+1.2375i 42 0.7094+1.5177i 43 0.7094+1.2375i
44 0.7327+0.9252i 45 0.7327+1.0200i 46 0.7094+0.9252i 47 0.7094+1.0200i 48 0.5833+0.5833i 49 0.5833+0.5803i 50 0.5803+0.5833i 51 0.5803+0.5803i 52 0.5833+0.7327i 53 0.5833+0.7094i 54 0.5803+0.7327i 55 0.5803+0.7094i 56 0.7327+0.5833i 57 0.7327+0.5803i 58 0.7094+0.5833i 59 0.7094+0.5803i 60 0.7327+0.7327i 61 0.7327+0.7094i 62 0.7094+0.7327i 63 0.7094+0.7094i 64 1.5177+0.1056i 65 1.5177+0.1052i
66 1.2375+0.1056i 67 1.2375+0.1052i 68 1.5177+0.1263i 69 1.5177+0.1260i 70 1.2375+0.1263i 71 1.2375+0.1260i 72 0.9252+0.1056i 73 0.9252+0.1052i 74 1.0200+0.1056i 75 1.0200+0.1052i 76 0.9252+0.1263i 77 0.9252+0.1260i 78 1.0200+0.1263i 79 1.0200+0.1260i 80 1.5177+0.3821i 81 1.5177+0.3842i 82 1.2375+0.3821i 83 1.2375+0.3842i 84 1.5177+0.3188i 85 1.5177+0.3200i 86 1.2375+0.3188i 87 1.2375+0.3200i
88 0.9252+0.3821i 89 0.9252+0.3842i 90 1.0200+0.3821i 91 1.0200+0.3842i 92 0.9252+0.3188i 93 0.9252+0.3200i 94 1.0200+0.3188i 95 1.0200+0.3200i 96 0.5833+0.1056i 97 0.5833+0.1052i 98 0.5803+0.1056i 99 0.5803+0.1052i 100 0.5833+0.1263i 101 0.5833+0.1260i 102 0.5803+0.1263i 103 0.5803+0.1260i 104 0.7327+0.1056i 105 0.7327+0.1052i 106 0.7094+0.1056i 107 0.7094+0.1052i 108 0.7327+0.1263i 109 0.7327+0.1260i
110 0.7094+0.1263i 111 0.7094+0.1260i 112 0.5833+0.3821i 113 0.5833+0.3842i 114 0.5803+0.3821i 115 0.5803+0.3842i 116 0.5833+0.3188i 117 0.5833+0.3200i 118 0.5803+0.3188i 119 0.5803+0.3200i 120 0.7327+0.3821i 121 0.7327+0.3842i 122 0.7094+0.3821i 123 0.7094+0.3842i 124 0.7327+0.3188i 125 0.7327+0.3200i 126 0.7094+0.3188i 127 0.7094+0.3200i 128 0.1056+1.5177i 129 0.1056+1.2375i 130 0.1052+1.5177i 131 0.1052+1.2375i
132 0.1056+0.9252i 133 0.1056+1.0200i 134 0.1052+0.9252i 135 0.1052+1.0200i 136 0.1263+1.5177i 137 0.1263+1.2375i 138 0.1260+1.5177i 139 0.1260+1.2375i 140 0.1263+0.9252i 141 0.1263+1.0200i 142 0.1260+0.9252i 143 0.1260+1.0200i 144 0.1056+0.5833i 145 0.1056+0.5803i 146 0.1052+0.5833i 147 0.1052+0.5803i 148 0.1056+0.7327i 149 0.1056+0.7094i 150 0.1052+0.7327i 151 0.1052+0.7094i 152 0.1263+0.5833i 153 0.1263+0.5803i
154 0.1260+0.5833i 155 0.1260+0.5803i 156 0.1263+0.7327i 157 0.1263+0.7094i 158 0.1260+0.7327i 159 0.1260+0.7094i 160 0.3821+1.5177i 161 0.3821+1.2375i 162 0.3842+1.5177i 163 0.3842+1.2375i 164 0.3821+0.9252i 165 0.3821+1.0200i 166 0.3842+0.9252i 167 0.3842+1.0200i 168 0.3188+1.5177i 169 0.3188+1.2375i 170 0.3200+1.5177i 171 0.3200+1.2375i 172 0.3188+0.9252i 173 0.3188+1.0200i 174 0.3200+0.9252i 175 0.3200+1.0200i
176 0.3821+0.5833i 177 0.3821+0.5803i 178 0.3842+0.5833i 179 0.3842+0.5803i 180 0.3821+0.7327i 181 0.3821+0.7094i 182 0.3842+0.7327i 183 0.3842+0.7094i 184 0.3188+0.5833i 185 0.3188+0.5803i 186 0.3200+0.5833i 187 0.3200+0.5803i 188 0.3188+0.7327i 189 0.3188+0.7094i 190 0.3200+0.7327i 191 0.3200+0.7094i 192 0.1056+0.1056i 193 0.1056+0.1052i 194 0.1052+0.1056i 195 0.1052+0.1052i 196 0.1056+0.1263i 197 0.1056+0.1260i
198 0.1052+0.1263i 199 0.1052+0.1260i 200 0.1263+0.1056i 201 0.1263+0.1052i 202 0.1260+0.1056i 203 0.1260+0.1052i 204 0.1263+0.1263i 205 0.1263+0.1260i 206 0.1260+0.1263i 207 0.1260+0.1260i 208 0.1056+0.3821i 209 0.1056+0.3842i 210 0.1052+0.3821i 211 0.1052+0.3842i 212 0.1056+0.3188i 213 0.1056+0.3200i 214 0.1052+0.3188i 215 0.1052+0.3200i 216 0.1263+0.3821i 217 0.1263+0.3842i 218 0.1260+0.3821i 219 0.1260+0.3842i
220 0.1263+0.3188i 221 0.1263+0.3200i 222 0.1260+0.3188i 223 0.1260+0.3200i 224 0.3821+0.1056i 225 0.3821+0.1052i 226 0.3842+0.1056i 227 0.3842+0.1052i 228 0.3821+0.1263i 229 0.3821+0.1260i 230 0.3842+0.1263i 231 0.3842+0.1260i 232 0.3188+0.1056i 233 0.3188+0.1052i 234 0.3200+0.1056i 235 0.3200+0.1052i 236 0.3188+0.1263i 237 0.3188+0.1260i 238 0.3200+0.1263i 239 0.3200+0.1260i 240 0.3821+0.3821i 241 0.3821+0.3842i
242 0.3842+0.3821i 243 0.3842+0.3842i 244 0.3821+0.3188i 245 0.3821+0.3200i 246 0.3842+0.3188i 247 0.3842+0.3200i 248 0.3188+0.3821i 249 0.3188+0.3842i 250 0.3200+0.3821i 251 0.3200+0.3842i 252 0.3188+0.3188i 253 0.3188+0.3200i 254 0.3200+0.3188i 255 0.3200+0.3200i 256 1.5177-1.5177i 257 1.5177-1.2375i 258 1.2375-1.5177i 259 1.2375-1.2375i 260 1.5177-0.9252i 261 1.5177-1.0200i 262 1.2375-0.9252i 263 1.2375-1.0200i
264 0.9252-1.5177i 265 0.9252-1.2375i 266 1.0200-1.5177i 267 1.0200-1.2375i 268 0.9252-0.9252i 269 0.9252-1.0200i 270 1.0200-0.9252i 271 1.0200-1.0200i 272 1.5177-0.5833i 273 1.5177-0.5803i 274 1.2375-0.5833i 275 1.2375-0.5803i 276 1.5177-0.7327i 277 1.5177-0.7094i 278 1.2375-0.7327i 279 1.2375-0.7094i 280 0.9252-0.5833i 281 0.9252-0.5803i 282 1.0200-0.5833i 283 1.0200-0.5803i 284 0.9252-0.7327i 285 0.9252-0.7094i
286 1.0200-0.7327i 287 1.0200-0.7094i 288 0.5833-1.5177i 289 0.5833-1.2375i 290 0.5803-1.5177i 291 0.5803-1.2375i 292 0.5833-0.9252i 293 0.5833-1.0200i 294 0.5803-0.9252i 295 0.5803-1.0200i 296 0.7327-1.5177i 297 0.7327-1.2375i 298 0.7094-1.5177i 299 0.7094-1.2375i 300 0.7327-0.9252i 301 0.7327-1.0200i 302 0.7094-0.9252i 303 0.7094-1.0200i 304 0.5833-0.5833i 305 0.5833-0.5803i 306 0.5803-0.5833i 307 0.5803-0.5803i
308 0.5833-0.7327i 309 0.5833-0.7094i 310 0.5803-0.7327i 311 0.5803-0.7094i 312 0.7327-0.5833i 313 0.7327-0.5803i 314 0.7094-0.5833i 315 0.7094-0.5803i 316 0.7327-0.7327i 317 0.7327-0.7094i 318 0.7094-0.7327i 319 0.7094-0.7094i 320 1.5177-0.1056i 321 1.5177-0.1052i 322 1.2375-0.1056i 323 1.2375-0.1052i 324 1.5177-0.1263i 325 1.5177-0.1260i 326 1.2375-0.1263i 327 1.2375-0.1260i 328 0.9252-0.1056i 329 0.9252-0.1052i
330 1.0200-0.1056i 331 1.0200-0.1052i 332 0.9252-0.1263i 333 0.9252-0.1260i 334 1.0200-0.1263i 335 1.0200-0.1260i 336 1.5177-0.3821i 337 1.5177-0.3842i 338 1.2375-0.3821i 339 1.2375-0.3842i 340 1.5177-0.3188i 341 1.5177-0.3200i 342 1.2375-0.3188i 343 1.2375-0.3200i 344 0.9252-0.3821i 345 0.9252-0.3842i 346 1.0200-0.3821i 347 1.0200-0.3842i 348 0.9252-0.3188i 349 0.9252-0.3200i 350 1.0200-0.3188i 351 1.0200-0.3200i
352 0.5833-0.1056i 353 0.5833-0.1052i 354 0.5803-0.1056i 355 0.5803-0.1052i 356 0.5833-0.1263i 357 0.5833-0.1260i 358 0.5803-0.1263i 359 0.5803-0.1260i 360 0.7327-0.1056i 361 0.7327-0.1052i 362 0.7094-0.1056i 363 0.7094-0.1052i 364 0.7327-0.1263i 365 0.7327-0.1260i 366 0.7094-0.1263i 367 0.7094-0.1260i 368 0.5833-0.3821i 369 0.5833-0.3842i 370 0.5803-0.3821i 371 0.5803-0.3842i 372 0.5833-0.3188i 373 0.5833-0.3200i
374 0.5803-0.3188i 375 0.5803-0.3200i 376 0.7327-0.3821i 377 0.7327-0.3842i 378 0.7094-0.3821i 379 0.7094-0.3842i 380 0.7327-0.3188i 381 0.7327-0.3200i 382 0.7094-0.3188i 383 0.7094-0.3200i 384 0.1056-1.5177i 385 0.1056-1.2375i 386 0.1052-1.5177i 387 0.1052-1.2375i 388 0.1056-0.9252i 389 0.1056-1.0200i 390 0.1052-0.9252i 391 0.1052-1.0200i 392 0.1263-1.5177i 393 0.1263-1.2375i 394 0.1260-1.5177i 395 0.1260-1.2375i
396 0.1263-0.9252i 397 0.1263-1.0200i 398 0.1260-0.9252i 399 0.1260-1.0200i 400 0.1056-0.5833i 401 0.1056-0.5803i 402 0.1052-0.5833i 403 0.1052-0.5803i 404 0.1056-0.7327i 405 0.1056-0.7094i 406 0.1052-0.7327i 407 0.1052-0.7094i 408 0.1263-0.5833i 409 0.1263-0.5803i 410 0.1260-0.5833i 411 0.1260-0.5803i 412 0.1263-0.7327i 413 0.1263-0.7094i 414 0.1260-0.7327i 415 0.1260-0.7094i 416 0.3821-1.5177i 417 0.3821-1.2375i
418 0.3842-1.5177i 419 0.3842-1.2375i 420 0.3821-0.9252i 421 0.3821-1.0200i 422 0.3842-0.9252i 423 0.3842-1.0200i 424 0.3188-1.5177i 425 0.3188-1.2375i 426 0.3200-1.5177i 427 0.3200-1.2375i 428 0.3188-0.9252i 429 0.3188-1.0200i 430 0.3200-0.9252i 431 0.3200-1.0200i 432 0.3821-0.5833i 433 0.3821-0.5803i 434 0.3842-0.5833i 435 0.3842-0.5803i 436 0.3821-0.7327i 437 0.3821-0.7094i 438 0.3842-0.7327i 439 0.3842-0.7094i
440 0.3188-0.5833i 441 0.3188-0.5803i 442 0.3200-0.5833i 443 0.3200-0.5803i 444 0.3188-0.7327i 445 0.3188-0.7094i 446 0.3200-0.7327i 447 0.3200-0.7094i 448 0.1056-0.1056i 449 0.1056-0.1052i 450 0.1052-0.1056i 451 0.1052-0.1052i 452 0.1056-0.1263i 453 0.1056-0.1260i 454 0.1052-0.1263i 455 0.1052-0.1260i 456 0.1263-0.1056i 457 0.1263-0.1052i 458 0.1260-0.1056i 459 0.1260-0.1052i 460 0.1263-0.1263i 461 0.1263-0.1260i
462 0.1260-0.1263i 463 0.1260-0.1260i 464 0.1056-0.3821i 465 0.1056-0.3842i 466 0.1052-0.3821i 467 0.1052-0.3842i 468 0.1056-0.3188i 469 0.1056-0.3200i 470 0.1052-0.3188i 471 0.1052-0.3200i 472 0.1263-0.3821i 473 0.1263-0.3842i 474 0.1260-0.3821i 475 0.1260-0.3842i 476 0.1263-0.3188i 477 0.1263-0.3200i 478 0.1260-0.3188i 479 0.1260-0.3200i 480 0.3821-0.1056i 481 0.3821-0.1052i 482 0.3842-0.1056i 483 0.3842-0.1052i
484 0.3821-0.1263i 485 0.3821-0.1260i 486 0.3842-0.1263i 487 0.3842-0.1260i 488 0.3188-0.1056i 489 0.3188-0.1052i 490 0.3200-0.1056i 491 0.3200-0.1052i 492 0.3188-0.1263i 493 0.3188-0.1260i 494 0.3200-0.1263i 495 0.3200-0.1260i 496 0.3821-0.3821i 497 0.3821-0.3842i 498 0.3842-0.3821i 499 0.3842-0.3842i 500 0.3821-0.3188i 501 0.3821-0.3200i 502 0.3842-0.3188i 503 0.3842-0.3200i 504 0.3188-0.3821i 505 0.3188-0.3842i
506 0.3200-0.3821i 507 0.3200-0.3842i 508 0.3188-0.3188i 509 0.3188-0.3200i 510 0.3200-0.3188i 511 0.3200-0.3200i 512 -1.5177+1.5177i 513 -1.5177+1.2375i 514 -1.2375+1.5177i 515 -1.2375+1.2375i 516 -1.5177+0.9252i 517 -1.5177+1.0200i 518 -1.2375+0.9252i 519 -1.2375+1.0200i 520 -0.9252+1.5177i 521 -0.9252+1.2375i 522 -1.0200+1.5177i 523 -1.0200+1.2375i 524 -0.9252+0.9252i 525 -0.9252+1.0200i 526 -1.0200+0.9252i 527 -1.0200+1.0200i
528 -1.5177+0.5833i 529 -1.5177+0.5803i 530 -1.2375+0.5833i 531 -1.2375+0.5803i 532 -1.5177+0.7327i 533 -1.5177+0.7094i 534 -1.2375+0.7327i 535 -1.2375+0.7094i 536 -0.9252+0.5833i 537 -0.9252+0.5803i 538 -1.0200+0.5833i 539 -1.0200+0.5803i 540 -0.9252+0.7327i 541 -0.9252+0.7094i 542 -1.0200+0.7327i 543 -1.0200+0.7094i 544 -0.5833+1.5177i 545 -0.5833+1.2375i 546 -0.5803+1.5177i 547 -0.5803+1.2375i 548 -0.5833+0.9252i 549 -0.5833+1.0200i
550 -0.5803+0.9252i 551 -0.5803+1.0200i 552 -0.7327+1.5177i 553 -0.7327+1.2375i 554 -0.7094+1.5177i 555 -0.7094+1.2375i 556 -0.7327+0.9252i 557 -0.7327+1.0200i 558 -0.7094+0.9252i 559 -0.7094+1.0200i 560 -0.5833+0.5833i 561 -0.5833+0.5803i 562 -0.5803+0.5833i 563 -0.5803+0.5803i 564 -0.5833+0.7327i 565 -0.5833+0.7094i 566 -0.5803+0.7327i 567 -0.5803+0.7094i 568 -0.7327+0.5833i 569 -0.7327+0.5803i 570 -0.7094+0.5833i 571 -0.7094+0.5803i
572 -0.7327+0.7327i 573 -0.7327+0.7094i 574 -0.7094+0.7327i 575 -0.7094+0.7094i 576 -1.5177+0.1056i 577 -1.5177+0.1052i 578 -1.2375+0.1056i 579 -1.2375+0.1052i 580 -1.5177+0.1263i 581 -1.5177+0.1260i 582 -1.2375+0.1263i 583 -1.2375+0.1260i 584 -0.9252+0.1056i 585 -0.9252+0.1052i 586 -1.0200+0.1056i 587 -1.0200+0.1052i 588 -0.9252+0.1263i 589 -0.9252+0.1260i 590 -1.0200+0.1263i 591 -1.0200+0.1260i 592 -1.5177+0.3821i 593 -1.5177+0.3842i
594 -1.2375+0.3821i 595 -1.2375+0.3842i 596 -1.5177+0.3188i 597 -1.5177+0.3200i 598 -1.2375+0.3188i 599 -1.2375+0.3200i 600 -0.9252+0.3821i 601 -0.9252+0.3842i 602 -1.0200+0.3821i 603 -1.0200+0.3842i 604 -0.9252+0.3188i 605 -0.9252+0.3200i 606 -1.0200+0.3188i 607 -1.0200+0.3200i 608 -0.5833+0.1056i 609 -0.5833+0.1052i 610 -0.5803+0.1056i 611 -0.5803+0.1052i 612 -0.5833+0.1263i 613 -0.5833+0.1260i 614 -0.5803+0.1263i 615 -0.5803+0.1260i
616 -0.7327+0.1056i 617 -0.7327+0.1052i 618 -0.7094+0.1056i 619 -0.7094+0.1052i 620 -0.7327+0.1263i 621 -0.7327+0.1260i 622 -0.7094+0.1263i 623 -0.7094+0.1260i 624 -0.5833+0.3821i 625 -0.5833+0.3842i 626 -0.5803+0.3821i 627 -0.5803+0.3842i 628 -0.5833+0.3188i 629 -0.5833+0.3200i 630 -0.5803+0.3188i 631 -0.5803+0.3200i 632 -0.7327+0.3821i 633 -0.7327+0.3842i 634 -0.7094+0.3821i 635 -0.7094+0.3842i 636 -0.7327+0.3188i 637 -0.7327+0.3200i
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660 -0.1056+0.7327i 661 -0.1056+0.7094i 662 -0.1052+0.7327i 663 -0.1052+0.7094i 664 -0.1263+0.5833i 665 -0.1263+0.5803i 666 -0.1260+0.5833i 667 -0.1260+0.5803i 668 -0.1263+0.7327i 669 -0.1263+0.7094i 670 -0.1260+0.7327i 671 -0.1260+0.7094i 672 -0.3821+1.5177i 673 -0.3821+1.2375i 674 -0.3842+1.5177i 675 -0.3842+1.2375i 676 -0.3821+0.9252i 677 -0.3821+1.0200i 678 -0.3842+0.9252i 679 -0.3842+1.0200i 680 -0.3188+1.5177i 681 -0.3188+1.2375i
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6.一种LDPC码字的解交织解映射方法，其特征在于，包括如下步骤：
对符号流软值数据依照相应的星座图进行软解映射处理以得到比特软值数据；其中所述符号流软值数据是接收端接收到如权利要求1所述的LDPC码字的交织映射方法得到的符号流经过快速傅里叶变换后得到；
对所述比特软值数据按行顺序写入存储空间并按列顺序从该存储空间内读出以得到第一次比特解交织后的比特软值数据；
将所述第一次比特解交织后的比特软值数据按预定长度分成连续的多个比特软值数据子块，并按照相应的比特交换图案变换所述比特软值数据子块的排列顺序以形成第二次比特解交织后的比特软值数据；
将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的校验部分分成第一校验部分比特软值数据和第二校验部分比特软值数据；
分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据进行第三次比特解交织以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据；
将所述第二次比特解交织后的比特软值数据中对应于LDPC码字中的信息比特部分与所述第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据拼接成比特软值数据流；
对所述比特软值数据流进行LDPC译码处理以得到解码后的比特流数据。
7.如权利要求8所述的LDPC码字的解交织解映射方法，其特征在于，所述分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据进行第三次比特解交织以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据包括：
分别对所述第一校验部分比特软值数据和所述第二校验部分比特软值数据按行顺序写入存储空间并按列顺序从该存储空间内读出以得到第三次比特解交织后的第一校验部分比特软值数据和第二校验部分比特软值数据。
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