Grundig Digital Radio User Manual
DIGITAL RADIO GUIDE
APPENDIX A: EUREKA 147
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APPENDIX A
The Eureka 147 System - System Description
Overview
The Eureka DAB System has been designed to ensure rugged and reliable reception by listeners
using fixed, portable or mobile receivers with non-directional antennas. The system is spectrum
and power efficient (equivalent or better than FM radio) and can be operated at any frequency up
to 3 GHz for mobile reception and at higher frequencies for fixed reception. It is suitable for use
on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable networks. It
currently uses the following audio compression techniques, MPEG 1 Audio Layer 2 and MPEG 2
Audio Layer 2 and supports a range of audio coding rates. It has a flexible digital multiplex, which
can support a range of source and channel coding options. This includes programme associated
data (PAD) services and independent data services (IDS).
using fixed, portable or mobile receivers with non-directional antennas. The system is spectrum
and power efficient (equivalent or better than FM radio) and can be operated at any frequency up
to 3 GHz for mobile reception and at higher frequencies for fixed reception. It is suitable for use
on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable networks. It
currently uses the following audio compression techniques, MPEG 1 Audio Layer 2 and MPEG 2
Audio Layer 2 and supports a range of audio coding rates. It has a flexible digital multiplex, which
can support a range of source and channel coding options. This includes programme associated
data (PAD) services and independent data services (IDS).
Eureka 147 is currently the only digital audio system that has met all the requirements of the ITU
for a new digital sound broadcasting system. It is designated ‘Digital System A’ and has the
status of a world-wide standard (ITU-R Recommendations BS 1114 and BO 1130 for terrestrial
and satellite sound broadcasting respectively). It is an open standard, fully specified within the
European Telecommunications Standards Institute (ETSI), in ETS 300 401.
for a new digital sound broadcasting system. It is designated ‘Digital System A’ and has the
status of a world-wide standard (ITU-R Recommendations BS 1114 and BO 1130 for terrestrial
and satellite sound broadcasting respectively). It is an open standard, fully specified within the
European Telecommunications Standards Institute (ETSI), in ETS 300 401.
The system provides strong error protection in the transmitted signal. The information transmitted
is spread in both the frequency and time domains and the effects of channel distortions and fades
are eliminated from the recovered signal in the receiver. This is achieved even when the receiver
is in a location with severe multipath propagation, whether stationary or mobile.
is spread in both the frequency and time domains and the effects of channel distortions and fades
are eliminated from the recovered signal in the receiver. This is achieved even when the receiver
is in a location with severe multipath propagation, whether stationary or mobile.
Efficient utilisation of the spectrum is achieved by interleaving multiple programme signals and by
the system’s ability to operate additional transmitters as gap fillers in a single frequency network
(SFN). A gap-filling transmitter in this arrangement receives and re-transmits the Eureka 147
signal on the same frequency.
the system’s ability to operate additional transmitters as gap fillers in a single frequency network
(SFN). A gap-filling transmitter in this arrangement receives and re-transmits the Eureka 147
signal on the same frequency.
Major System Features
Like almost all digital radio systems, Eureka 147 uses standard audio compression techniques
and COFDM. As Eureka 147 was the first standardised digital radio system, the audio
compression techniques used in all Eureka 147 implementations are now somewhat dated.
and COFDM. As Eureka 147 was the first standardised digital radio system, the audio
compression techniques used in all Eureka 147 implementations are now somewhat dated.
A Eureka 147 transmission has an emission bandwidth of 1.536 MHz, which is capable of
providing a range of useful data rates depending on the level of protection. The multiplex contains
audio programs; program associated data and, optionally, other data services. Each audio
program or data service is independently error protected with a variable coding overhead, the
amount of which depends on the requirements of the broadcasters (transmitter coverage and
reception quality). A specific part of the multiplex contains information on how the multiplex is
configured, so that a receiver can decode the signal correctly, and, possibly, information about
the services themselves, the links between different services, and conditional access information
for subscription services.
providing a range of useful data rates depending on the level of protection. The multiplex contains
audio programs; program associated data and, optionally, other data services. Each audio
program or data service is independently error protected with a variable coding overhead, the
amount of which depends on the requirements of the broadcasters (transmitter coverage and
reception quality). A specific part of the multiplex contains information on how the multiplex is
configured, so that a receiver can decode the signal correctly, and, possibly, information about
the services themselves, the links between different services, and conditional access information
for subscription services.
Eureka 147 is a mature system with 29 standards and related documents published by the
European Telecommunication Standards Institute (ETSI). The ITU has included details of the
Eureka 147 system in its Digital Sound Broadcasting (DSB) Handbook and Recommendations
BS.1114 and BO.1130.
European Telecommunication Standards Institute (ETSI). The ITU has included details of the
Eureka 147 system in its Digital Sound Broadcasting (DSB) Handbook and Recommendations
BS.1114 and BO.1130.