1、 547172011 DRM 30 27 2002 . 184- , 1.02004 . 1 - 2 3 13 2011 . 878-4 - (-) - (ETSI):Recommendation ITU-R BS.1514-1 System for digital sound broadcasting in the broadcasting bandsbelow 30 MHzRecommendation ITU-RBS.1615-1 Planning parameters for digital sound broadcasting at frequenciesbelow 30 MHzRec
2、ommendation ITU-R BS.1348-1 Service requirements for digital below 30 MHzISO/IEC 23003-1: Information technology MPEG audio technologies Part 1: MPEG SurroundStandard ETSI ES 201980 v3.1.1 (200908) Digital Radio Mondiale (DRM); System Specification5 , - . () . - , , 2012 , - - II 5471720111 .12 , ,
3、.12.1 12.2 .22.3 .23 DRM 30 . . 33.1 33.2 .33.3 53.4 54 . .74.1 74.2 MPEG-4 CELP 84.3 MPEG-4 HVXC .84.4 SBR 84.5 PS .84.6 .94.7 MPEG Surround (MPS) 95 95.1 95.2 . .95.3 95.4 .116 .126.1 126.2 . 126.3 126.4 146.5 MSC.147 157.1 .157.2 OFDM, 167.3 .167.4 177.5 187.6 .19 () .2025III 547172011 DRM 30 Sys
4、tem for digital broadcasting DRM in the broadcasting bands below 30 MHz.Technical bases 201207011 DRM 30 . - 1, 2 :- DRM;- DRM;- OFDM , 30.2 , , 2.1 :2.1.1 (cell): Ts, -. OFDM K , .2.1.2 () (energy dispersal): , - , - .2.1.3 (Fast Access Channel) (FAC): -, , -.2.1.4 / (kbit/s): (1000 )2.1.5 (logical
5、 frame): , 400 .2.1.6 (Main Service Channel) (MSC): , .2.1.7 (multiplex frame): , . -.1 547172011 2.1.8 c OFDM (OFDM symbol): , -, - .2.1.9 (reserved for future addition) (rfa): . .2.1.10 (reserved for future use) (rfu): . - .2.1.11 (Service Description Channel) (SDC): , , . SDC , .2.1.12 (Single Fr
6、equency Network) (SFN): , .2.1.13 (transmission frame): - OFDM, OFDM .2.1.14 (transmission super frame): -, OFDM SDC.2.2 :fR ;K OFDM;Kmax OFDM ;Kmin OFDM ;T , 831/3 (1/12 );Tf ;Tg ;Ts OFDM;Tsf , ;Tu () OFDM, - .2.3 :AAC (Advanced Audio Coding) ;AF (Audio Frequency) ;AFS (Alternative Frequency Switch
7、ing) ;AM (Amplitude Modulation) ;BER (Bit Error Rate) ;CELP (CodeExcitedLinearPrediction) ;CRC (Cyclic Redundancy Check) ;DAB (Digital Audio Broadcasting) ;DRM (Digital Radio Mondiale) ;DSB (Double Side Band) ;EEP (Equal Error Protection) ;ER (Error Robust) ;FAC (Fast Access Channel) ;FEC (ForwardEr
8、rorCorrection) ;HF (High Frequency) ;FM (Frequency Modulation) ;HVXC (Harmonic Vector Excitation Coding) -;2 547172011ISO (International Organization for Standardization) -;LF (Low Frequency) ;LPC (Linear Predictive Coding) ;MF (Medium Frequency) ;MPEG (Moving Picture Experts Group) ;MPS (MPEG Surro
9、und) ;MSC (Main Service Channel) ;OFDM (Orthogonal Frequency Division Multiplexing) ;Pan (Panorama) , ;PS (Parametric Stereo) ;QAM (Quadrature Amplitude Modulation) ;RF (Radio Frequency) ;rfa (reserved for future addition) ;rfu (reserved for future use) ;SA (Stereo Ambience) ;SAC (Spatial Audio Codi
10、ng) ;SBR (Spectral Band Replication) ;SDC (Service Description Channel) ;SFN (Single Frequency Network) ;SM (Standard Mapping) ;SPP (Standard Protected Part) ;SSB (Single Side Band) ;UEP (Unequal Error Protection) ;VXC (Vector Excitation Coding) .3 DRM 30 3.1 DRM (Digital Radio Mondiale) -30, , ( 14
11、8,5 283,5 ), ( 526,5 1606,5 ) - ( 2,3 27 ) . . :- , ;- , . ., , ( ) , - .3.2 3.2.1 DRM , 1.3.2.2 :- ;- ;- FAC- (Fast Access Channel);- SDC- (Service Description Channel).3 5471720113.2.2.1 MSC(Main Service Channel). - , . :- , (), ;- ;- ( ) , , - ;- , ;- DRM , ( - ).3.2.2.2 FAC ( ) - ( , , ), (), .3.2.2.3 SDC ( ) , -, , , , .3.2.3 - . . , -. ( ).3.2.4 .3.2.5 , .4 547172011 1 DRM3.2.6 QAM.3.2.7 QAM , ,
