(JBE Vol. 17, No. 6, November 2012) a), A Study on the AM/FM Digital Radio for Practical Use Based on DRM and DRM+

Transcription

1 (JBE Vol 17 No 6 November 2012) (Special Paper) (JBE Vol 17 No 6 November 2012) ISSN (Print) DRM / a) b) A Study on the / Digital Radio for Practical Use Based on DRM and Sung-Kyu Park a) and Goo-Man Park b) DRM IN-BAND OUT-OF-BAND LOW-VHF TV 5 6 OUT-OF-BAND IN-BAND Hybrid OUT-OF-BAND / Abstract In this paper the possibility and necessity of the digital broadcasting propulsion in and is presented based on DRM and transmission modes They are the members of series technological family in digital radio development As the frequency utilization the application of is flexible in any mode such as IN-BAND or OUT-OF-BAND When the digital audio broadcasting is planned at LOW-VHF bandwidth such as TV channel No5 and NO6 being adjacent to band and OUT-Of-BAND technology is applied there is no collision and jamming Particularly in the IN-BAND Hybrid mode it is mentioned that there was the difficulty problem for multiple transmitters uses Not like the IN-BAND mode the OUT-OF-BAND mode lets multiple transmitters because neighbor transmitters do not interfere each other Digital transmitter can be combined with the existing transmitter The intensity of power and size of area can be easily determined according to local broadcasters' condition And the OUT-OF-BAND mode is advantageous for / integration in digital radio receiver manufacturing which makes the conversion schedule much shorter Keyword : Digital Radio DRM a) IT (Seoul National University of Science and Technology Graduate School of Public Policy and Information Technology) b) IT (Seoul National University of Science and Technology Dept Electronics and IT Media Engineering) Corresponding Author : (Goo-Man Park) gmpark@seoultechackr Tel: Fax: M anuscript received September Revised November Accepted November

2 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) DAB(Digital Radio Broadcasting) -147(Eureka-147) SW DRM(Digital Radio Mondiale) IBOC(In-Band On Channel) 2002 HD-Radio ISDB-T DTV ISDB-Tsb DAB DMB 2005 DAB DAB+ DRM VHF ' ' 2012 < 1> [1] IN-BAND OUT- OF-BAND IN-BAND SW DRM30 IBOC(In-Band On Channel) HD-Radio OUT-OF-BAND Band III(174~240MHz) DAB DAB MHz DRM30 30~120MHz MHz [2] ETSI ES V321 Band III 174~240MHz 30~240MHz VHF TV IN-BAND OUT-OF-BAND [3] 1 Fig 1 The frequency distribution for radio broadcasting and digital radio transmission mode

3 (JBE Vol 17 No 6 November 2012) Hybrid CD All Digital DAB+ IBOC(HD-Radio) 1) DAB IN-BAND Hybrid (Single Frequency Network) DRM30 / 1 E 100Km (Fading) 6 ITU (IFRD International Frequence Registration Board) 1) 2009 ~2010 ( ) DAB DAB+ HD-Radio DRM (' ' ETRI 20116)

4 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) [4] DRM30 30MHz SW DRM HD- Radio DRM DRM < 3>(a) 2 ( : ) Fig 2 Frequency Bandwidth of Radio Channel (Source : Criterion of Frequency Designation) < 2> 10KHz KHz 5265~16065KHz KHz 9KHz 1080KHz 400KHz DRM30 DRM(Digital Radio Mondiale) Hybrid < 3>(b) All Digital [3] < 3>(b) All Digital 45KHz DRM [5] < 3> 9KHz 18KHz 9KHz [6] (a) (b) 3 (a) DRM (b) DRM ( : ETSI ) Fig 3 (a) DRM Analog and Digital Hybrid Mode (b) DRM All Digital Mode (Source : ETSI )

5 (JBE Vol 17 No 6 November 2012) 64 A B C D < 1> AAC CELP HVXC +SBR 2) Q [5] 2~72Kbps 9KHz 131~309Kbps 20~24Kbps [7] 1 DRM Table 1 Characteristics of DRM audio codes All Digital 3 [5][8] 1 VHF TV 88~108MHz 20MHz 2) DRM AAC(Advanced Audio Coding) CELP(Code excited Linear Prediction) HVXC(Harmonic Vector excitation Coding) 3 +SBR(Spectral Band Replication) MPEG AAC+ (2011 )

6 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) < 4> 260KHz 200KHz [4] All Digital 633% 63%fh 265% 196% 05% 67% 3) [8] IN-BAND Hybrid OUT-OF- BAND All Digital DAB DAB+IBOC 260KHz 200KHz 2 DAB DAB+ 881 MHz 1 번채널 883 MHz 2 번채널 885 MHz 3 번채널 1079 MHz 100 번채널 4 ( : ) Fig 4 Frequency Bandwidth of Radio Channel (Source : of Frequency Designation) IN-BAND 400KHz IN-BAND Criterion DAB(Digital Audio Broadcasting) OUT-OF-BAND VHF Band-III L-Band Multiplex 1536MHz (Ensamble) 6MHz TV 3 DMB 115Mbps DMB H264 BSAC EUREKA-147 DAB MUSIC MPEG-2 Layer-II DAB DAB+ HE-AACv2(High Efficiency Advanced Audio Coding AAC+) < 5>(a) DAB 9 DAB < 5>(b) DAB+ 24 DAB+ 48 3) (2008) 2030 ( )

7 (JBE Vol 17 No 6 November 2012) DAB+ DAB DMB 3 HD-Radio (IBOC) 5 (a) DAB (b) DAB+ ( : ETRI ) Fig 5 (a) DAB Multiplex service (b) DAB+ Multiplex service (Source : ETRI) DAB DAB+ HD-Radio IBOC IN-Band < 6> Hybrid < 7> < 6> Hybrid 109Kbps 3 < 7> HD-Radio All Digital 400KHz 300Kbps 8 HD-Radio [10] PAC(Perceptual 6 HD-Radio Hybrid ( : BE) Fig 6 The HD-Radio Hybrid mode service type in band (Source : BE)

8 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) 7 HD-Radio All-Digital ( : BE) Fig 7 The HD-radio All-Digital mode service type (Source : BE) Audio Coder) HDC(High Definition Audio Coding) HD-Radio IN-BAND ~120MHz MHz [11] ETSI ES V321 DAB DAB+ DMB Band (174~240MHz) 30~240MHz [3] 47 MHz to 68 MHz (Band I) allocated to analogue television broadcasting; 658 MHz to 74 MHz (OIRT band); 76 MHz to 90 MHz (Japanese band); 875 MHz to 1079 MHz (Band II) allocated to radio broadcasting; 174 MHz to 240 MHz (Band III) allocated to digital broadcasting This extension completes the family of digital standards for radio broadcasting (Source : ETSI ES V321) < 1> 30~240MHz VHF TV 88~ 108MHz IN-BAND OUT-OF-BAND < 8> 220kHz 180kHz 180kHz

9 (JBE Vol 17 No 6 November 2012) 8 ( : ) Fig 8 Analog and Digital Hybrid mode service type (Source : KETI ) 100KHz 1 400KHz In-Band < 9> All Digital 200KHz 100KHz 2 100KHz 3~4 Hybrid 9 ( : ) Fig 9 All Digital mode service type (Source : KETI) < 2> All Digital 64Q DRM 18KHz 72Kbps E 4Q 16Q 96KHz 40~186Kbps [5] 2 Table 2 Service Block and bit rates DRM < 3> DRM A B C D 64Q E 30~240MHz 4 16 A B C D E MSC(Main Sevice Channel) 4Q 16Q FAC(Fast Access Channel) SDC (Service Description Channel) 4Q 1/9 100ms

10 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) 3 Table 3 spectrum occupancy parameter and channel bandwidth by Robustness mode 5 OUT-OF-BAND OUT-OF-BAND (88~108MHz) TV 5 ~6 (76~88MHz) IV VHF TV [12] 800KHz CP CP SBS TV 6 SBS TV KBS12 MBC TV KBS SBS TV Ch6 MBC Multiplex 100KHz TTA 2010 DAB DAB+ HD-Radio [13] < 4> QPSK 16Q AWGN SNR

11 (JBE Vol 17 No 6 November 2012) 4 ( : ) Table 4 The receive sensitivity by transmission mode (Source : Broadcast & technology) HD Radio (MP3) HD Radio (MP5) (Q: QPSK) (16: 16Q) DAB DAB+ T-DMB Audio (dbm) -20dB: dB Q: : (Ch10B) (Ch10B) (Ch10B) HD-Radio P1 0dB QPSK 36dB DAB 69dB ( ) [db] HD-Radio 38dBuV/m DAB 45dBuV/m IN-BAND Hybrid -10dB < 5> 964% 733% HD Radio -10dB [14] 444% Hybrid 333% < 5> Multipath 45Km HD Radio > > T-DMB 100W 1kW ( : Single Frequency Network) Gap Filler < 6> 0 db 342us Delay DAB 330us Delay 100km HD Radio 0 db 5 ( : ) Table 5 The receive efficiency by each transmission mode (Source : Broadcast & technology) DAB DAB+ T-DMB Audio HD Radio MP3 (-10dB) Hybrid (QPSK) Analog ( ) 82% 842% 834% 917% 964% 733% ( 45km ) 107% 136% 124% 384% 2329% 301% 444% 444% 444% 444% 333% 444%

12 1 : DRM / (Sung-Kyu Park et al : A Study on the / Digital Radio for Practical Use Based on DRM and ) 6 ( : ) Table 6 organization simplicity by each transmission mode (Source : Broadcast & technology) HD Radio (MP3) HD Radio (MP5) (Q: QPSK) (16: 16Q) DAB DAB+ T-DMB Audio 0dB 69 us 342us 332 us 332 us 332 us 69 us delay 20km [14] IN-BAND Hybrid OUT-OF-BAND 1 IN-BAND Hybrid All Digital 2 DRM/ VHF TV Ch56 OUT-OF-BAND DAB DMB OUT-OF-BAND All Digital Analog + Digital Hybrid Fig 10 The reason why is difficult in the Analog + Digital Hybrid method < 10> HD-Radio OFDM IN-BAND DMB Hybrid Hybrid OF-BAND IN-BAND OUT- OUT-OF-BAND IN-BAND HD-Radio + Hybrid < 10> < 11> OUT-OF-BAND LOW-VHF TV 5~6 (76~88MHz) 12MHz 200KHz All Digital VHF TV Fig 11 The Plan of Digital Radio Frequency by using Low-VHF TV Channel

13 (JBE Vol 17 No 6 November 2012) Gap Filler DRM (88~ 108MHz) DRM / DRM/ OUT-OF-BAND TV DRM/ DRM / DRM HD-Radio DRM DRM DRM DRM DRM / IN-BAND Hybrid All Digital OUT- OF-BAND RF / Digital TV 5 6 All DRM

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