Abstract
The digital audio broadcasting (DAB) system is mainly designed for large-area coverage and is suited for a single-frequency network (SFN) operating in Very High Frequency (VHF) Band III. To operate successfully, the SFN requires a different network-planning approach for multiple-frequency networks and should avoid self-interference. This paper focuses on nationwide SFN planning and DAB channel-allocation planning to replace all frequency-modulation (FM) services with terrestrial DAB services in VHF Band III. In South Korea, VHF Band III has been used for terrestrial digital multimedia broadcasting (T-DMB) services; thus, available frequencies should be investigated for T-DAB services and the nationwide SFN. An approach for broadcasting channel-interference analysis is proposed herein. For the interference analysis, the geographical features and the information for stations of legacy FM radio broadcasting and T-DMB, such as transmission parameters, are considered. The ratio of the interference area to the coverage is calculated via the channel-interference analysis. Areas affected by the self-interference in the nationwide SFN are investigated. The results of this paper provide insights regarding channel-allocation planning for T-DAB services and an approach for nationwide SFN planning.
Highlights
Digital-radio broadcasting technology was first developed by Europe in 1980s [1], and the conventional analog frequencymodulation (FM) radio is currently being replaced by digital radios throughout the world
Because the same frequency is allocated to all transmitters in a given coverage area in an singlefrequency network (SFN), the SFN requires a different network-planning approach from the multiplefrequency network (MFN), in which different frequencies are allocated to each transmitter for avoiding undue interference between adjacent transmitters
In South Korea, as T-digital audio broadcasting (DAB) services have been considered for application in Very High Frequency (VHF) Band III with legacy terrestrial digital multimedia broadcasting (T-digital multimedia broadcasting (DMB)) services, our research group has been investigating various TDAB channel-allocation plans to minimize the interference between new T-DAB and legacy T-DMB channels [23, 24]
Summary
Digital-radio broadcasting technology was first developed by Europe in 1980s [1], and the conventional analog frequencymodulation (FM) radio is currently being replaced by digital radios throughout the world. In South Korea, as T-DAB services have been considered for application in VHF Band III with legacy T-DMB services, our research group has been investigating various TDAB channel-allocation plans to minimize the interference between new T-DAB and legacy T-DMB channels [23, 24]. Channel-interference analysis for broadcasting service areas is required for optimal frequency planning for new communication systems. This study investigates a T-DAB channel-allocation plan with nationwide SFN for national and local broadcasting services in VHF Band III.
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