I. 1997 8 DAB, 2 KBS 98 DAB. 2000 4, 2000 Eureka - 147 2001 3 KBS 2001 3 DAB DAB.,, ( ),,,,, DAB. DAB. DAB 2003. 3. 2001, 2002 2 2002 3. 2001. DAB, DAB,.
II. DAB 1. Eureka- 147 DAB 86 EC 88, 91 92 94 DAB. Eureka - 147 EC, 44 2001 57.,.. < 1> DAB < 1> 2001 9 DAB
. DAB. 2. DAB 90 DAB 90 IBOC(In - band On - channel), IBA C(In - band A djacent - channel) 10. 98 USADR (USA Digital Radio), LDR (Lucent Digit al Radio), DRE (Digital Radio Express ) 3 99 DRE DAB, 2000 7 USADR LDR ibiquity DAB ibiquity. DAB Eureka- 147 DAB, ISDB- T IBOC 3. IBOC DAB. ibiquity IBOC USADR (idab ) LDR PAC(Perceptual Audio Coding ). Harris, Nautel, Broadcast Electronics, Arm strong, Continental Electronics 5 IBOC ibiquity AM/ FM. ibiquity 2001 8 IBOC 2001 NRSC F CC ( ) AM 2002 AM FM. ibiquity 2003.
3.,. / / ISDB- T, 98. 99. ( ) 2003. ISDB- T OFDM MPEG- T S. 4.,, Eureka- 147,. Eureka- 147 ISDB- T ISDB- T. < 1>,, DAB
. < 1> DAB 99 6, 2001 1 L- Band VHF 57 DAB 57% 96 3 DRM AM DAB Eureka- 147 L - Band DAB 2 DAB SFN 18% DAB Digital Broadcasting Conference (Broadcasting Corporation of China ) BroadcastA sia2001 DAB L- Band DAB 97
III. DAB 1. (Netw ork Operator : NO), (Multiplex Operator : MO), (Service Provider : SP ). Radio Authority (RA ). AM FM. 12, 12.. NT L Crown Castle. Crown Castle BBC, NT L Digital One, / NT L Crown Castle. DAB,. Regulatory T elecommunication & Post (RT P ) 2 (Digital Radio).,. (Deut sche T elekom ) ARD,...
FM 2010, 2015 FM, FM. T V 95%. DAB 20%. 2. ( ) CD. CD,, CD. CD,..,,. 25%, 5%, 70%. (EPG),, / / / ( ), IP. IP MPEG- 2 MPEG- 4. (SP ) SP (kbps ) SP SP
1 1 3.,. Digital One 7 2006. 3. / DAB (Hi- Fi),,,, PC 50. GSM DAB 2,500, PDA 2002 UMT S (British T elecom ). 300 1,000, PC 200., 80 40. 2001 150, 2002 100. < 2> ( )
. 2000 5, DAB 1995. 2000 2001. 50,00 40,00 30,00 20,00 10,00 1998 12 1999 12 2000 12 2001 3 2001 9 < 3> ( ) 4.. DAB. DAB. DAB. - - - - DAB ( ) - DVB- T ( )
DAB,,. - (2002 20 ) - (MP3 ) - - PDA - - - DVB- T DAB.. DAB. Digital One 2006. DAB,,.,.,,.
IV. DAB 1. 1996 DAB 1997-1998 Eureka- 147, DAB. 2001 2002 2 3. CD DAT,. E 1, < 4>. < 4> DAB
2. CD DAT. AES/ EBU, MPEG- 1,2 Layer 2. 6, 32 384kbps. MPEG- 1. Eureka - 147 W G1/ W G2. IT IS ML2000. (En semble). Eureka- 147 DAB, DT V (T S ). (ET I). IT IS D- MUX. ET I (NI) (NA ) 2, 75 BNC. ET I- NI, S - T ET I- NA. ET I- NI ET I- NA E 1.. ( ) ( ) E 1. 9 pin 120 twist pair, UT P. ET I- NI.. KBS, MBC, SBS
.. COFDM 3. COFDM, RF,, RF Eureka - 147. Rohde&Schw arz NA6100E. 200 1000W RMS, 174 216MHz(T V 7 13) 10-9. VSWR 1.5. ET I- NI ET I- NA, RF EIA 1 5/ 8. U - Link DAB. U - link 12 / 2. 2D 4 4, 7.9dB. RF S 659. DT V 48m. < 2>. < 2> RF (e.r.p) 207MHz 1.536MHz 1kW 1dB 7.9dB 4kW 640m
V. 1. DAB DAB.. MapInfo MapX 4.5, 5000:1 PC.,. DAB DAB DAB... DAB. 2.. - DAB Rhode&Schw artz ESVB.
- DAB,. -,,. -,. -. - (Cartographic). (250m 2 2km 2 ).. -,. -.,. 3.
3.1 DAB (50m 2, 250m 2, 1km 2, 2km 2 ). 3.2-10... - DAB...( 100km 5km, 5km, 5 10km, 10 1km,..., 95 100km, 100km.) 3.3. - 10.. - DAB.. < 5>, < 6>
DAB 100km 10km., < 5> < 6>
VI. OFDM 1. OFDM. QPSK - OFDM. 2. OFDM SP (Special Pilot s ) (Guard Interv al). (ripple). OFDM.. N 0. FFT < 7>. - N 0.
< 7> Scattered Pilot FFT 3. N 0 2, D =. N 0 8. D ( m ) = - N 0 ( m ) 8 (1) 4. 4.1 < 3>..
12 3. BPSK 4/ 3. < 4>. < 3> OFDM 1405 3.97kHz 252u sec 1/ 8(31.5u sec) QPSK Punctured Conv olution Code G1 = 171 octal, G2 = 133 octal Coding Rates = 1/ 2, 2/ 3, 3/ 4 < 4> 14.8887u sec 8 (3bit s ) D/ U 3,6,9,12,15usec 7 1 70 4.2 QPSK - OFDM (BER), < 8> BER. D/ U. < 9> BER 2 10-4 BER. < 9> C/ N
0.4 1.4dB. < 8> < 9>
VII. DAB 1. DAB,,. (EPG),, / / / ( ), IP. IP MPEG- 2 MPEG- 4. BBC,,,,, Digit al One (EPG),, SFB. DAB. (SFB) < 10> < 11>. < 10>, < 11>. < 10> < 11>
. PC,.. 2. DAB. Eureka - 147 (MPEG 1,2 Layer 2) 10-4, 10-1 0.,,,. Eureka- 147 8/ 11 Eb/ No 13 db 10-4. 8/ 14 10-6, Eureka - 147 8/ 24 10-1 0.... 3 db 1/ 100.
. 10-1 0. Eureka- 147 DVB - T (204,188) 8/ 14 Eb/ No 13 db 10-1 0. DAB. Eureka- 147, Eureka - 147.., DAB. DAB 1994 40. 200....,.
VIII. 2000 DAB Eureka - 147, 2001 3, 2003. KBS 1998 DAB 2001 3 DAB.,, ( ),,, DAB. DAB DAB KBS,. DAB, DAB,. 2002 2 3. 2, 1, T V. 2. 2002, DAB.