1、 GYGY/T 268.1 2013 1 Digital audio broadcasting in FM band Part 1:Framing structure,channel coding and modulation for digital broadcasting channel 2013 - 08 - 14 2013 - 08- 14 GY/T 268.1 2013 I . IV . V 1 . 1 2 . 1 3 . 1 3.1 . 1 3.2 . 4 3.3 . 5 3.4 . 5 3.5 . 5 4 . 6 4.1 . 6 4.2 . 7 4.3 . 7 4.4 . 8 4
2、.5 . 9 4.6 . 11 4.7 . 12 5 . 12 5.1 . 12 5.2 .135.3 . 14 5.4 . 15 5.5 OFDM . 23 5.6 . 23 5.7 MSDS .265.8 OFDM . 28 5.9 . 28 5.10 . 30 5.11 . 32 5.12 . 32 A . 38 B . 39 C . 41 D LDPC . 44 1 . 6 GY/T 268.1 2013 II 2 . 7 3 . 8 4 . 8 5 CRC . 12 6 . 12 7 . 13 8 QPSK . 15 9 16QAM . 16 10 64QAM . 17 11 16Q
3、AM =1 . 18 12 16QAM =2 . 18 13 16QAM =4 . 19 1464QAM =1.2015 64QAM =2 . 21 16 64QAM =4 . 22 17 . 23 18 . 23 19 . 26 20 . 28 21 OFDM . 29 22 . 29 23 . 30 24 1 . 31 25 2 . 31 26 3 . 32 27 . 33 28 2 . 33 29 9 . 34 30 10 . 34 31 22 . 35 32 23 . 35 B.1 9 . 39 B.2 10 . 40 C.1 1 3 OFDM . 41 C.2 2 OFDM . 41
4、 1 . 9 2 . 10 3 . 10 4 . 10 5 . 11 6 . 11 7 LDPC . 14 GY/T 268.1 2013 III 8 l . 15 9 Ms,t . 24 10 Ms,t . 24 11 Ms,t SDIS . 26 12 1,2,3,4, (1,2,)jjjjIMMMMjNMSDS SDIS .2613 L . 28 14 . 29 15 Tg . 30 16 0dB 1 . 36 17 0dB 2 . 36 18 0dB 9 . 36 19 0dB 10 . 36 19 . 37 20 0dB 22 . 37 21 0dB 23 . 37 A.1 P .
5、38 A.2 Q . 38 C.1 B OFDM . 42 C.2 A OFDM . 42 C.3 B . 43 C.4 A . 43 GY/T 268.1 2013 IV GY/T 268 1 2 GY/T 268 1 GB/T 1.1-2009SAC/TC 239 GY/T 268.1 2013 V 2 11 A 10 2 100866 010-86092122 GY/T 268.1 2013 1 1 1 87MHz 108MHz87MHz 108MHz2 GB/T 4311-2000 3 3.1 3.1.1 guard interval 3.1.2 code rate 3.1.3 tr
6、ansmission mode OFDM 3.1.4 super frame 4 3.1.5 GY/T 268.1 2013 2 pilot OFDM3.1.6 symbol mapping3.1.7 interleaving 3.1.8 logic frame 3.1.9 scattered pilot OFDM 3.1.10 continual pilot OFDM 3.1.11 spectrum mode 3.1.12 forward error correction code 3.1.13 scramble code 3.1.14 upper half-sub-band 3.1.15
7、physical frameGY/T 268.1 2013 3 640ms OFDM 43.1.16 beacon 3.1.17 lower half-sub-band 3.1.18 cyclic prefix0FDM OFDM 3.1.19 centre frequency OFDM 0 100kHz3.1.20 system information path 3.1.21 virtual sub-band 3.1.22 virtual sub-carrier OFDM 3.1.23 valid sub-band 3.1.24 valid sub-carrier OFDM 3.1.25 se
8、rvice description information path GY/T 268.1 2013 4 3.1.26 service data path3.1.27 sub-band 50kHz OFDM100kHz 3.1.28 sub-band identified frequency50kHz3.1.29 sub-carrier matrix OFDM3.1.30 sub-frame 160ms 3.2 H LDPC M NI NMUX Nv Nzc 1 3 =967 2 =487 Pb(n) Ps(i) pI pQ SN OFDM SFp,q p q p=1,2,3,4,q=1,2,
9、3,4 S(t) Sb(t) Sn(t) n OFDM T TB TBcp Tb GY/T 268.1 2013 5 TCP OFDM Tg Tr OFDM Tr=Tcp Tr= TBcp Ts OFDM Tsf Tu OFDM w(t) f OFDM ( f)b 3.30 3.4 FM Frequency Modulation GI Guard Interval IFFT Inverse Fast Fourier Transform LDPC Low Density Parity Check MSB Most Significant Bit MSDS Main Service Data Sy
10、mbol OFDM Orthogonal Frequency Division Multiplex QAM Quadrature Amplitude ModulationQPSK Quadrature Phase Shift Keying SDIS Service Description Information Symbol 3.5 / mod(a,b) a b ()e j 2 1j Re GY/T 268.1 2013 6 Q(a/b) a b (a b ) R(a/b) a b 4 4.1 1 1 1N22N1 1100kHz100NI kHz NI 2GY/T 268.1 2013 7
11、4.2 2LDPC 1/4OFDMLDPCOFDM2 4.3 640ms 640msA 4 2560ms4 160ms 1 SN (SN 1) OFDM35.10 4 3 GY/T 268.1 2013 8 640ms1 2 3 41 2 3 41 2 3 41 2 432560ms3 OFDM1OFDM2OFDMNS160ms4 4.4 1160ms T=1/816000sT A GY/T 268.1 2013 9 1 1 2 3 OFDMms uT 2.51(2048T) 1.255(1024T) 2.51(2048T) ms cpT 0.2941 240T 0.1716 140T 0.0
12、686 56T OFDM ms scpuTTT 2.804 2288T 1.426 1164T 2.5786 2104T OFDMHz f 398.4375 796.8750 398.4375 ms BcpsfsNuTTTST 0.4706 384T 0.4069 332T 0.2059 168Tms BBcpuTTT 2.9804(2432T) 1.6618(1356T) 2.7157(2216T) Hz ()bf 796.875 1593.75 796.875 OFDMNS 56 111 61 ms sfT 160 130560T 160 130560T 160 130560T 1 vN
13、242 122 242 NvNv/2 4.5 NI 2NI 100kHz 2 50kHzDB1(U) DB1(L)GB/T 4311-2000 -1 12 A DA B DB A(100i+50)kHz i = 0,1 B 100kHz(100i)kHz i = 0,1,2 3 t0t1t2 3 B9 10 2 GY/T 268.1 2013 10 2 -5 -4 -3 -2 -1 1 2 3 4 5 I1 DB1(L) DB1(U) DB2(L) DB2(U) DB3(L) DB3(U) DB4(L) DB4(U) DB5(L) DB5(U) 1 2 0 DA1(L) DA1(U) DA2(
14、L) DA2(U) DA3(L) DA3(U) DA4(L) DA4(U) 0 2 3 8 9 0 DA1(L) DA1(U) DA2(L) DA2(U) DA3(L) DA3(U) DA4(L) DA4(U) 0 1 10 DB1(L) DB1(U) DB2(L) DB2(U) DB3(L) DB3(U) DB4(L) DB4(U) DB5(L) DB5(U) 2 11 21 22 DB1(L) DB1(U) DB2(L) DB2(U) DB3(L) DB3(U) DB4(L) DB4(U) DB5(L) DB5(U) 1 23 0 DA1(L) DA1(U) DA2(L) DA2(U) D
15、A3(L) DA3(U) DA4(L) DA4(U) 0 2 24 64 L U 3 t0t1t2 kHz 000 0 001 50 010 100 011 150 100 200 101 111 6 4 5C4 s0 s5 000001 1 000010 2 001001 9 001010 10 010110 22 010111 23 GY/T 268.1 2013 11 5 B 1,10,22A 2,9,23 4.6 48 CRCb0b1 b47 6 6 0b 1b 9b 10b 12b 13b 18b 19b 20b 21b 22b 23b 24b 25b 26b 27b 28b 29b
16、 30b 31b 32b 33b LDPC 34b 35b LDPC 36b 41b 42b 47b CRC 6 b0 0 1 b1 b9 b1 b9 b1I 87+0.1I MHz b1b9 1 b10 b12 3 t0 t2 b13 b18 4 s0 s5 b19 b20 00 1 01 2 10 311 4 b21 b22 00 1 01 2 10 311 4 b23 b24 00 01 1 10 2 113 b25 b26 00 QPSK 01 16QAM 10 64QAM 11b27 b28 00 QPSK 01 16QAM 10 64QAM 11 GY/T 268.1 2013 1
17、2 b29 b30 00 01 =1 10=2 11 =4 b31 0 1 b32 b33 LDPC 00 1/4 01 1/3 10 1/211 3/4 b34 b35 LDPC 00 1/4 01 1/3 10 1/211 3/4 b32 b33 b34 b35b32 b35b32 b33 b34 b35 b36 b41 b42 b47 CRC 0 41 CRC 6 42 47 CRC CRCG6(x)= x6+x5+x3+x2+x+1 5 1 +D D D D D D+ + + +b47 b46 b44b45 b42b435 CRC4.7 5 5.1 MSBPs(i) Ps(i) 6 x
18、12+x11+x8+x6+1 100000000000+D D D D D D D D D D D D)(iPs1 0 0 0 0 0 0 0 0 0 0 06 GY/T 268.1 2013 13 2 1 ()()()saiXiPi . (1) a(i) X(i) 5.2 LDPC 5.2.1 7 1/4 7 133171 145 133, 0 ,0,1,1iaiT0,1,2,3,iiiixxxx 0,1,2,5iT ;6532,0 iiiiii aaaaax ;6321,1 iiiiii aaaaax ;641,2 iiiii aaaax ;6532,3 iiiiii aaaaax i 0
19、,1,2,1T ia50,1,2,3, 0,TiiiiixxxxU 012423(,)iTUuuuuu,44,0,1,2,423i iiRQuxiT b0D D D D D D+ + + + + + + +ia0,ix1,ix2,ix3,ix7 GY/T 268.1 2013 14 5.2.2 LDPCLDPC 9216 7 7 LDPC LDPC k N 3/4 6912 9216 1/2 4608 9216 1/3 3072 9216 1/4 2304 9216 011,kmmmm 019215,.,kpppp LDPC019215011019215,kkccccmmmppp 019215
20、,.,kppppH 2 0THc . (2) H LDPC D0 9216-k 1 0 5.3 5.3.1 0121(,)MUXNUuuuu MUXN0121(,)MUXNvvvvv ()nRnvu ()Rn (0,0;)()()();MUXforinisiifpiNRnpin(0)0p ()mod(5(1),),(0)pipigsi 2log2 MUXNs g=(s/4)-1 GY/T 268.1 2013 15 NMUX=l NI l8 8 l 1 2 3QPSK 1704 2=3408 1576 2=3152 1360 2=2720 16QAM 1704 4=6816 1576 4=63
21、04 1360 4=5440 64QAM 1704 6=10224 1576 6=9456 1360 6=8160 5.3.2 5.3.1 NMUX 216 5.4 QPSK QPSK 16QAM 64QAMv (v0 v1 v2 ) QPSK 16QAM 64QAM5.4.1 5.4.1.1 QPSK QPSK 2 221(,0,1,2,)iivvi I Q 8QPSK =1QPSK 2 222001011 01QI01vv0v1v28 QPSK 5.4.1.2 16QAM 16QAM 4 4414243(,0,1,2,)iiiivvvvi I Q9 GY/T 268.1 2013 16 1
22、01101101101103103103103 0010 00001000 10101001 1011 0011 00011101 11111100 11100111 010101000110IQ0123vvvv 13vv02vv9 16QAM 5.4.1.3 64QAM 64QAM 6 66162636465(,0,1,2,)iiiiiivvvvvvi I Q10 GY/T 268.1 2013 17 421423 001101 001111101111 101101101110 101100 001100 001110111110 111100 011100 011110000111010
23、110000101010100100111110110100101110100427101010 101000 001010001000 000010 000000100010100000425101011 101001 001011001001 000011 000001100011100001427425423421421423425427421423425427100100 100110 000110 000100111111 111101 011101 011111110101 110111 010111 010101111011 111001 011001 011011110001
24、110011 010011 010001111010 111000 011000 011010110000 110010 010010 010000IQ012345vvvvvv024vvv135vvv10 64QAM 5.4.2 16QAM 64QAM b29b305.4.2.1 16QAM 16QAM 4 4414243(,0,1,2,)iiiivvvvi I Q11 13 GY/T 268.1 2013 18 101101101101103103103103 0010 00001000 10101001 1011 0011 00011101 11111100 11100111 010101
25、0001100123vvvvI 02vvQ 13vv11 16QAM =1 Q2200123vvvv2204204204204200010 00001000 10101001 1011 0011 00011101 11111100 11100111 01010100011013vvI 02vv22022012 16QAM =2 GY/T 268.1 2013 19 4524524524526526526526520010 00001000 10101001 1011 0011 00011101 11111100 11100111 0101010001100123vvvv Q 13vvI 02v
26、v13 16QAM =4 5.4.2.2 64QAM 64QAM 6 66162636465(,0,1,2,)iiiiiivvvvvvi I Q14 16 GY/T 268.1 2013 20 421423001101 001111101111 101101101110 101100 001100 001110111110 111100 011100 011110000111010110000101010100100111110110100101110100427101010 101000 001010001000 000010 000000100010100000425101011 1010
27、01 001011001001 000011 000001100011100001427425423421421423425427421423425427100100 100110 000110 000100111111 111101 011101 011111110101 110111 010111 010101111011 111001 011001 011011110001 110011 010011 010001111010 111000 011000 011010110000 110010 010010 010000012345vvvvvvI 024vvvQ 135vvv14 64Q
28、AM =1 GY/T 268.1 2013 21 260012345vvvvvv460001101 001111101111 101101101110 101100 001100 001110111110 111100 011100 011110000111010110000101010100100111110110100101110100860101010 101000 001010001000 000010 000000100010100000660101011 101001 001011001001 000011 000001100011100001100100 100110 00011
29、0 000100111111 111101 011101 011111110101 110111 010111 010101111011 111001 011001 011011110001 110011 010011 010001111010 111000 011000 011010110000 110010 010010 010000260460660860Q 135vvvI 024vvv26046086066026046066086015 64QAM =2 GY/T 268.1 2013 22 4108001101 001111101111 101101101110 101100 001100 001110111110 111100 011100 01111000011101
