Digital Audio Broadcasting Networks Research Articles

Analysis of the Single Frequency Network Gain in Digital Audio Broadcasting Networks

The single frequency network (SFN) is a popular solution in modern digital audio and television system networks for extending effective coverage, compared to its traditional single-transmitter counterpart. As benefits of this configuration appear to be obvious, this paper focuses on the exact analysis of so-called SFN gain—a quantitative effect of advantage in terms of the received signal strength. The investigations cover a statistical analysis of SFN gain values, obtained by means of computer simulations, with respect to the factors influencing the coverage, i.e., the protection level, the reception mode (fixed, portable, mobile), and the receiver location (outdoor, indoor). The analyses conclude with an observation that the most noteworthy contribution of the SFN gain is observed on the far edges of the networks, and the least one close to the transmitters. It is also observed that the highest values of the SFN gain can be expected in the fixed mode, while the protection level has the lowest impact.

Additional information Processing System in The Digital Audio Broadcasting Network

Представлено новий спосіб і пристрої системи цифрового звукового мовлення DAB стандарту ETSi EN 300 401 з можливістю стеганографічної обробки циркулюючої в ній інформації шляхом введення до складу MPEG -кодека DAB стеганографічної системи

Towards a configurable SoC MPEG-4 advanced simple profile decoder

The evaluation of various architectural designs to allow low bandwidth digital video decoding and reception over the digital audio broadcasting network, and the problem of how to find and implement an optimal HW/SW partition on a Programmable Logic Device with an embedded ARM9 processor are focused. Profiling and design space exploration techniques are applied to the advanced simple profile of an MPEG-4 decoder, for which an innovative SystemC-based system-level design tool, called CASSE, has been used. Simulations results showed that a throughput of 15 QCIF frames per second can be achieved with a low area and low power implementation. Details of this implementation and where the results differ from simulation are presented.

DAB Ensemble Planning --- Problems and Techniques

The paper is about the planning of ensembles and block assignments for DAB (Digital Audio Broadcasting) networks. Besides offering superior audio quality and multimedia data services, DAB has the p...

Vorhersage und Messung der Bitfehlerrate in COFDM-Gleichwellennetzen

For the digital terrestrial transmission scheme Digital Audio Broadcasting (DAB) and Digital Video Broadcasting (DVB-T), the prediction of the Bit Error Rate (BER) for a specific reception area is a characteristic variable. State-of-the-art methods to determine the BER for Coded Orthogonal Frequency Division Multiplex (COFDM) are either restricted to some typical propagation scenarios with simple echo profiles or they use general statistic channel models, which allow an analytical derivation of the BER. These methods and scenarios are suitable to investigate the general system behavior or to simulate different competing transmission schemes. For radio network planning they are not appropriate. This is mainly due to the very general results, which have no direct link to the actual propagation situation. Based on detailed qualitative and quantitative investigations of all relevant disturbance factors for DAB and DVB-T, this paper presents a new and very fast BER calculation method, which uses the results of wave propagation prediction models. The approach is verified by measurements in the L-band in an operational DAB network.

Optimization of Digital Single Frequency Networks

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.