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In order to take advantage of the network gain of digital single frequency networks, the set of parameters that characterize the transmitter network have to be chosen properly. Detailed investigations aiming to optimize the service area by means of numerical simulation are presented, where realistic transmitter configurations and common wave propagation models exploiting topographic data have been employed. The system parameters, such as the maximum effective radiated power per transmitter, have been restricted to realistic values which might be realized in digital audio broadcasting networks to be introduced in the near future. Antenna pattern adjustment appears to be less effective in comparison to improving the single frequency network synchronization schedule. Übersicht: Um den Netzgewinn digitaler Gleichwellennetze ausschöpfen zu können, müssen die Parameter, die die Eigenschaften des Netzes bestimmen, sorgfältig gewählt werden. Es werden detaillierte Untersuchungen vorgestellt, deren Ziel die Optimierung des Gleichwellennctzes hinsichtlich einer Maximierung des versorgten Gebietes ist. Die Analysen basieren auf realistischen Senderstandorten und üblichen topographisch gestützten Wellenausbreitungsmodellen. Die Netzwerkparameter, z. B. die maximale Sendeleistung pro Sender, wurden auf Werte beschränkt, die für digitale Tonrundfunknetze, deren versuchsweise Inbetriebnahme kurz bevorsteht, vorgesehen sind. Die Verwendung von Strahlungsdiagrammen erweist sich weit weniger effektiv mit Blick auf eine Versorgungsverbesserung als ein sorgfältige zeitliche Synchronisation der Sender. Für die Dokumentation: Gleichwellennetz / Feldstärkeprädiktion / Sendersynchronisation / Antennendiagramm / Sintflut-Algorithmus Optimization of Digital Single Frequency Networks FREQUENZ 49(1995)11-12

The provision of terrestrial broadcast services using 3GPP technologies was enabled for the first time in LTE Advanced Pro Release (Rel‐) 14, in which the evolved Multimedia Broadcast Multicast Service (eMBMS) technology was enhanced to fulfill a wide set of requirements input by the broadcast industry. During the Enhancements for Television (EnTV) work item in Rel‐14, several modifications were realized affecting system architecture, core, and radio access, which include, an interface to grant control to broadcasters to establish audiovisual services, an application programming interface for developers to simplify access to eMBMS procedures, or a transparent delivery mode with native content formats, among others. At the radio layer, dedicated carriers with 100% broadcast content allocation, and also new OFDM numerologies to support larger intersite distances in Single Frequency Networks (SFNs), were enabled. The most significant change was the so‐called receive‐only mode which enables devices receiving broadcast content without the need for uplink capabilities, SIM cards, or network subscriptions, i.e. free‐to‐air reception.In Rel‐16, 3GPP carried out a study item to evaluate EnTV Rel‐14 against the terrestrial broadcast requirements for 5G defined in 3GPP TR 38.913. Two requirements were detected as not met: the ability to support SFNs with cell radii of up to 100 km and mobile reception with speeds up to 250 km h−1. A Rel‐16 work item standardized further improvements while taking into account practical considerations such as implementation complexity and performance. The improved system is known as LTE‐based 5G Terrestrial Broadcast, and also with the popular name 5G Broadcast.

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