伝送路符号化部 DVB-S.2 規格の概要 - soumu.go.jp

1 1 1. 3 2. 3 3 CRC-8 3 Merger / Slicer 4 5 3. 6 4. FEC 7 7 8 10 5. 12 6. 14 14 14 SOF 14 MODCOD 15 TYPE 15 PLS 15 16 16 7. 17 30 1 ETSI(European Telecommunication Standard Institute ) DVB-S EN 302 307 (2005-03) DVB-S 8 PSK 16 APSK 32 APSK LDPC BCH C/N C/N Constant Coding and Modulation (CCM) Variable Coding and Modulation (VCM) Adaptive Coding and Modulation (ACM)

2 1 3 8 PSK DVB SNG Digital Satellite News Gathering DVB-SNG DVB-S SNG 2004 CS CS 8 PSK 3/5, 2/3 CCM(Constant Coding and Modulation) 2 ETSI EN 302 307 (2005-03) DVB-S LDPC BCH DVB-S 25 35% ITU-R WP6S (DSNG) 1/4, 1/3, 2/5 1/2, 3/5, 2/3, 3/4, 4/5, 5/6,8/9, 9/10 8 PSK3/5, 2/3, 3/4, 5/6, 8/9, 9/10 16 APSK2/3, 3/4, 4/5, 5/6, 8/9, 9/10 32 APSK3/4, 4/5, 5/6, 8/9, 9/10 CCM ( 1) VCM ACM ( 2) ( ) 64800 (bits) ( ) 16200 (bits) ( 1) ( 2) ( 2) ( 2) , , ( 3) ( 3) ( 3) ( 3) ( 3) ( 3) ( 3) ( 3) QPSK = = = 1: CCM 2: ACM 3: ACM/VCM TS CCM TS 31.

3 ETSI EN 302 307 Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications 1 CRC-8 BCH LDPC PL PL FEC 8 PSK 3/5 2/3 3/4 FEC PL CRC-8 BCH LDPC PL PL FEC 8 PSK 3/5 2/3 3/4 FEC PL 1 2. 188 8 CRC-8 8 CRC 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 QPSK 8 PSK 16 APSK32 APSK 4g(X) = (X5 + X4 + X3 + X2 +1)(X2 + X + 1)(X+1) = X8 + X7 + X6 + X4 + X2 + 1 CRC CRC = remainder[ X8 u(X) : g(X)] 2 CRC-8 BBHEADER SYNC 2 CRC-8 Merger / Slicer DATA FIELD UPL CRC-8 : A UPL-8.

4 B 8 = EXORUP CRC-8 AABB12345678AB 5 3 Generic stream 80 10 MATYPE 2 MATYPE-1 TS/GS 2 TS SIS/MIS 1 CCM/ACM 1 CCM ISSYI 1 NPD 1 Null RO 2 8 UPL 2 MPEG TS 188 8D DFL 2 SYNC 1 SYNCD 2 CRC-8 1 9 6 TS/GS MSB 3. BBFRAME PRBS 1+X14 + X15 100101010000000 4 15 141312111098765 4 3 2 1 0 0 0 00001010 1 0 0 1 0 0 0 0 0 0 1 1 .. BBFRAME BBFRAME 74.

5 FEC BCH LDPC FEC 5 2 t BCH 3 t LDPC BCH Kbch BCH Nbch LDPC kldpc BCH t- LDPC nldpc 1/4 16 008 16 200 12 64 800 1/3 21 408 21 600 12 64 800 2/5 25 728 25 920 12 64 800 1/2 32 208 32 400 12 64 800 3/5 38 688 38 880 12 64 800 2/3 43 040 43 200 10 64 800 3/4 48 408 48 600 12 64 800 4/5 51 648 51 840 12 64 800 5/6 53 840 54 000 10 64 800 8/9 57 472 57 600 8 64 800 9/10 58 192 58 320 8 64 800 Nbch kldpc LDPCFEC BCHFEC BBFRAME (nldpc bits) Nbch-Kbch Kbch nldpc-kldpc 8 3 BCH g1(x) 1+X2+X3+X5+X16 g2(x) 1+X+X4+X5+X6+X8+X16 g3(x) 1+X2+X3+X4+X5+X7+ X8+X9+X10+X11+X16 g4(x) 1+X2+X4 +X6+X9+ X11+X12+X14+X16 g5(x) 1+X+X2+X3+X5+X8+X9+ X10+X11+X12+X16 g6(x) 1+X2+X4+X5+X7+X8+ X9+X10+X12+X13+X14+X15+X16 g7(x) 1+X2+X5+X6+X8+ X9+X10+X11+X13+X15+X16 g8(x) 1+X+X2+X5+X6+X8 +X9+X12+X13+X14+X16 g9(x) 1+X5+X7+X9+ X10+X11+X16 g10(x) 1+X+X2+X5+X7+X8 +X10+X12+X13+X14+X16 g11(x) 1+X2+X3+X5+X9+X11+X12+X13+X16 g12(x) 1+X+X5+X6+X7+X9+X11+X12+X16 m=( mk bch -1, mk bch-2, , m1, m0) c=( mk bch -1, mk bch-2, , m1, m0, dn bch- k bch-1, dn bch- k bch-2, , d1, d0) BCH m(x)= mk bch-1x kbch-1+ mk bch-2x kbch-2+ +m1x+m0 xnbch--kbch x nbch- kbch m(x) g(x) d(x)=dn bch-k bch-1xnbch- kbch-1+ +d1x+ d0 c(x)=xnbch- kbchm(x)+d(x) ldpcldpcknpppp i 0 B 1 2/3 359 i m , m= 1, 2.

6 ,359 im { x +m mod 360 q }mod (nldpc - kldpc ) x i 0 q 4 2/3 q = 60 i1 361 i 360 i 719 2 360 000ipp =01049110491ipp =01604316043ipp =0506506ipp =01282612826ipp =080658065ipp =082268226ipp =027672767ipp =0240240ipp =01867318673ipp =092799279ipp =01057910579ipp =02092820928ipp =16060ipp =11055110551ipp =11610316103ipp =1565565ipp =11288612886ipp =181258125ipp =182868286ipp =128272827ipp =11873318733ipp =193399339ipp =11063910639ipp =12098820988ipp =1300300ipp = 10 i =1 pi pi 4 q q 1/4 135 1/3 120 2/5 108 1/2 90

7 3/5 72 2/3 60 3/4 45 4/5 36 5/6 30 8/9 20 9/10 18 8 PSK LDPC MSB 8 PSK 3/5 MSB 3 6 7 8 PSK FEC nldpc=64800 21600 1,..2,11 = = ldpcldpciiiknippp1,..,1,0 =ldpcldpckni 11 6 8 PSK 3/5 7 8 PSK 3/5 BBHeader MSB BBHeader MSB 1 21600 1 3 FECFRAME LSB MSB MSB FEC LSB BBHeader MSB BBHeader MSB 3 1 21600 1 3 FECFRAME LSB MSB MSB FEC LSB 125.

8 QPSK = /4 =100 01 10 11 Q=LSB I=MSBQ I 8 QPSK 8 PSK 64800 FEC 8 PSK 64800/3 XFEC (Complex FECFRAME) 000001101111011 010 110100QI MSBLSB =1 = /4 9 PSK 16 APSK 16 APSK 10 0101 = /4R1R2 = /120010 10100100000010001100110111101111 LSBQ 0110 0111 0011 101110010001I MSB =R2/R1 10 16 APSK 32 APSK 32 APSK 11 10010 = /4R1R2 = /1200100 0010110000000000000110001100111010110111 LSB 0011100110 10110 10100 MSB I 0001000011R301000 11000 11010 0101011011010110111111111 0111011110 1110001100 11101011010100111001 = /8 Q 1=R2/R1 2=R3/R1 11 32 APSK 146. XFEC 90 8 PSK XFEC 240 16 36 -1 -16 -S -1 -2 -SXFEC PLSCODE S 90 1 ( /2 BPSK) 16 ( )36 90(S+1)+P int{(S-1)/16} (P = 36 ) SOF 12 PLFRAME PLFRAME XFEC 36 / 2 BPSK 90 SOF 26 Start of Frame PLS 64 64 7 32 2 7 MODCOD 5 XFEC TYPE 2 FEC (64800)

9 SOF SOF 18D2E82 HEX 2 MSB MODCOD MODCOD 5 5 MODCOD Mode MODCODMode MODCODMode MOD COD Mode MODCODQPSK 1/4 1D QPSK 5/6 9D 8 PSK 9/10 17D 32 APSK 4/5 25D QPSK 1/3 2D QPSK 8/9 10D 16 APSK 2/3 18D 32 APSK 5/6 26D QPSK 2/5 3D QPSK 9/10 11D 16 APSK 3/4 19D 32 APSK 8/9 27D QPSK 1/2 4D 8 PSK 3/5 12D 16 APSK 4/5 20D 32 APSK 9/10 28D QPSK 3/5 5D 8 PSK 2/3 13D 16 APSK 5/6 21D Reserved 29D QPSK 2/3 6D 8 PSK 3/4 14D 16 APSK 8/9 22D Reserved 30D QPSK 3/4 7D 8 PSK 5/6 15D 16 APSK 9/10 23D Reserved 31D QPSK 4/5 8D 8 PSK 8/9 16D 32 APSK 3/4 24D DUMMY PLFRAME 0D TYPE TYPE MSB FEC 0=normal:64800bits; 1=short:16200bits TYPE LSB 0= 1= PLS MODCOD TYPE (64,7) 13 PLS (32,6) 1 - (y1, y2, , y32) (y1, y1 b7, y2, y2 b7.)

10 , y32 b7) b1 b6 b7 16 MODCOD TYPE MSB 14 32 01010101010101010101010101010101 00110011001100110011001100110011 00001111000011110000111100001111 00000000111111110000000011111111 00000000000000001111111111111111 11111111111111111111111111111111 14 MODCOD TYPE MSB 36 I = (1/ 2), Q = (1/ 2) 16 SOF CI+jCQ ISCRAMBLED = ( ICI QCQ ); QSCRAMBLED = ( ICQ + QCI ) 15 P=36 (SCRAMBLING SEQUENCE ACTIVE) 90 Scrambling RESET ( ) 1 Slot-1 Slot-16 Pilot Slot-S G = 17 CI(i) + jCQ(i) = exp(jRn(i) /2) Rn exp(jRn /2) Iscrambled Qscrambled 0 1 I Q 1 j -Q I 2 -1 -I -Q 3 -j Q -I 16 =0 7.