CONTENTS

1.���� Introduction
2.���� Service and system requirements
������� 2.1���� Sound quality levels
������� 2.2���� Sound control signals
������� 2.3���� Service configurations
������� 2.4���� Service delivery
������� 2.5���� Service information
���� ���2.6���� Interface
������� 2.7���� Service availability
������� 2.8���� Spectrum efficiency
������� 2.9���� Complexity
3.���� System design considerations
������� 3.1���� Channel characteristics
������� 3.2���� Basic system characteristics
������������� ����3.2.1���� Modulation and channel coding
����������������� 3.2.2���� Source coding
4.���� Terrestrial digital sound broadcasting planning
������� 4.1����� Frequency planning aspects
������� 4.2���� Appropriate frequency bands
����������������� 4.2.1��� �Possible frequency bands from a technical point of view
����������������� 4.2.2���� Frequency bands currently allocated to other services
����������������� 4.2.3���� Frequency bands allocated to broadcasting
������� 4.3���� System bandwidth

������� 4.4 ����Transmission system� considerations
����������������� 4.4.1���� Polarization
����������������� 4.4.2���� Receiving antenna
����������������� 4.4.3���� Minimum usable field strength
����������������� 4.4.4���� Propagation
����������������� 4.4.5���� Link budget
������� 4.5���� Sharing considerations for planning
����������������� 4.5.1���� Intra service
����������������� 4.5.2���� Inter service
Required geographical separations between DSB and point-to-multipoint
������� 4.6���� Network and coverage concepts
����������������� 4.6.1����� Conventional networks
����������������� 4.6.2���� Synchronized single frequency network (SFN)
����������������� 4.6.3���� Non-synchronized single frequency network
Annex 1-A
Digital audio broadcasting (DAB) system description (Digital System A)
1.���� Introduction
2.���� Use of a layered model
3.���� Application layer
������� 3.1���� Facilities offered by the System
������� 3.2���� Audio quality
������� 3.3���� Transmission modes
4.���� Presentation layer
������� 4.1���� Audio source encoding
������� 4.2���� Audio decoding
������� 4.3���� Audio presentation
������� 4.4���� Presentation of Service Information
5.���� Session layer
������� 5.1���� Programme selection
������� 5.2���� Conditional access
6.���� Transport layer
�� �����6.1���� Programme services
������� 6.2���� Main service multiplex
������� 6.3���� Ancillary data
������� 6.4���� Association of data
7.���� Network layer
������� 7.1���� ISO audio frames
8.���� Data link layer
������� 8.1���� The transmission frame
9.���� The physical layer
������� 9.1���� Energy dispersal
������� 9.2���� Convolutional encoding
������� 9.3���� Time interleaving
������� 9.4���� Frequency interleaving
������� 9.5���� Modulation by 4‑DPSK OFDM
������� 9.6���� Spectrum of the RF‑signal
ANNEX 1-B
System experimental evaluations (Digital System A)
1.���� Initial experiments
������� 1.1���� Rennes and Geneva - 1988
������� 1.2���� South of London and Paris - 1991
������� 1.3���� Ottawa, Toronto, Montreal and Vancouver - 1990
������� 1.4���� Las Vegas, Birmingham, Berlin and San Francisco - 1991
2.���� Later experiments
������� 2.1���� Joint EBU/Eureka 147 Digital System A evaluation ad hoc Group tests
����������������� 2.1.1���� Field tests of the system
��������������������� 2.1.2.���� RF performance characteristics of Digital System A
������� 2.2���� Current experiments
����������������� 2.2.1���� Propagation/coverage testing in Trois Rivi�res - Canada
����������������� 2.2.2���� SFN field measurements in Montreal - Canada
����������������� 2.2.3���� VHF Paris Digital System A network
Signal features; network description
Transmitting sites
����������������� 2.2.4���� Digital System A field trials at 1.5 GHz in Rennes and Paris
System parameters
Transmitting parameters
Paris experiment
Signal features
Transmitting site
Further studies
����������������� 2.2.5���� High powered field trials in London
ANNEX 1-C
Applicable propagation/channel characteristics and related experimental results
1.���� Broadcast channel model

2.���� Experimental results in the 1 452 - 1 492 MHz band for digital sound broadcasting
������� 2.1���� Results of field measurements in Canada
����������������� 2.1.1���� Effect of channel bandwidth


����������������� 2.1.2���� Results of coverage measurements
����������������� 2.1.3���� Results of indoor reception measurements
Conclusions
����������������� 2.1.4���� Comparisons with propagation models

����������������� 2.1.5���� SFN field trials at 1 452-1 492 MHz
����������������� 2.1.6���� Recent wideband channel characterization measurements at 1.5 GHz
������� 2.2���� Results of field measurements in Europe
����������������� 2.2.1���� Introduction
����������������� 2.2.2���� System and transmitting parameters
����������������� 2.2.3���� Measurements methods
���������������� �2.2.4���� Processing methods
����������������� 2.2.5���� Results
����������������� 2.2.6���� Conclusions
3.������ Experimental results below 1 000 MHz
������� 3.1���� General
������� 3.2���� Variations of field strength with location
����������������� 3.2.1���� Comparisons between standard deviations of field strength for CW signals and T‑DSB signals with a band width of 1.75 MHz
����������������� 3.2.2���� Comparisons between DSB signals of different bandwidths in different types of� environment
�������� ���������3.2.3���� Comparisons between location variations in Bands I and III
����������������� 3.2.4���� The effect of multiple sources on signal levels
������� 3.3���� Implications of man‑made noise on minimum usable field strength
������� 3.4���� Measurements of building penetration losses at 211 MHz and 64 MHz
ANNEX 1-D
Computer simulations of coverage concepts
1.���� Computer program for synthesis and prediction of DSB coverage
2.���� Non-synchronized SFN DSB coverage simulations at 1.5 GHz
1.���� System parameters
2.���� Receiver parameters
3.���� Transmitter parameters
3.���� Synchronized SFN computer simulations at 1.5 GHz
4.���� Computer simulation results and discussion: minimum ERP vs. transmitter spacing
5.���� Conclusion
annex 1-e
Computer simulations of system performance (Digital System A)
1.���� Introduction
2.���� Computer simulation model
������� 2.1���� General model
������� 2.2���� Mobile terrestrial channel model
������� 2.3���� Limitations of the simulations
3.���� Simulation results and discussion
������� 3.1���� Time interleaving depth
������� 3.2���� Soft decision quantization levels

������� 3.3���� Convolutional code constraint length
4.���� Conclusions
ANNEX 2
In-band on channel (IBOC) digital sound broadcasting systems description
1.���� Introduction
2.���� IBOC implementation of DSB
3.���� Description of systems
������� 3.1���� FM system
������� 3.2���� AM systems
4.���� Conclusion