DABDRM

2004326.

1

FMAM

CD

:

FMDAB1/30FM3

AM1/4

2DABAM

15FM-147 DABDigital Audio Broadcasting-253

WorldDAB20027

100%98%90%80% 70% 65%62% 50% 40%35%30% 30%26% 19% 18%15%12% 10%

DABFM

10DABDAB

199819983AMDRMDigital Radio Mondiale DRM

DRMUSADRUSADRLucent TechnologieiBiquity30KHzDRMITU30MHz

ITUDRM200360DRM

DRMa)DRMIEC IECDRM

b)ITU-RIEC30MHz

c)ETSIDRM-ETSIETSI

IEC2002IECDRMPAS62272-1

DRMETSIETSI20019 ETSI TS 101 980 V1.1 (2001-09) Digital Radio Mondiale(DRM);

DRMITUIEC2000DRM

AMAMAMAM9KHz10KHzFMAM

DABAM

3DABAM

31

DAB30MHzAM30MHz

DAB47MHz-3GHzFM87-108 MHzDABFMDAB87-108 MHzDABDAB

DABVHF375MHzUHF750MHz1.5GHz3GHz1.5GHz3GHzDAB

AMAM

32

DAB130MHz-3GHz2200Km/h3

DAB

DAB

DRM30MHz

30MHz9kHz10kHzDRMAM4.5kHz5kHz18 kHz20 kHz

OFDMOFDM

1(0.6)4QAM,16QAM,64QAM

2 OFDM OFDM

A B C BD B

33 DAB T-DAB C-DAB S-DAB

SFNVHF60L15

DABDAB6DAB

DAB

DAB9CD

DABDAB

DABCOFDM

AMAM AM

34 DABCOFDM1.536MHz()2432kb/s, 1.583b/s/Hz,2304 kb/s

2 X 96 kb/sCD1/26CDDAB250KHz

DABPADIFCIFDCMSC

DRM1kb/sRDS

AMCOFDMAM9KHz10KHz

A10KHz228TS=26.666ms64QAM651.3 kb/s,5.13 b/s/ Hz

0.626.6 kb/s16QAM0.6218.5kb/s

35 DABMUSICAMMPEG1-LAYER22X768kb/s296kb/sCD

DABMPEG2-LAYER2

AMMPEG4SBR

RF9KHz10KHzFM

AMMPEG-4 AACSBRCELP4-20 kb/sHVXC2-4kb/s

36

DAB78/98/108/318/3224

AMDAB

CCETT/TDFTurboThomcastTCMAMDABDVB7

37

DABCFODM4DPSK

AMCOFDM16QAM64QAMQPSKQPSK=4QAM

38

DAB4DPSKDAB250km/h

1000km/h AMAM

39

COFDM

COFDMDAB-SFN

DRMDAB

310

DABDABDABFMDAB DAB

DAB60%DAB DAB

DRMAMPDMPSMDXM2W

AMAMAMAM

4DABAM

DRMAMDABDAB DRM

DABDRMDABDRM

5