Can the Digital Surpass the Analog: DAB+ Possibilities, Limitations and User Expectations

Radio is by far the most accessible medium. With its mobility and availability, it attracts listeners by its simplicity and friendliness. The present information situation is characterized by the convergence of computers, mobile devices, telecommunication and broadcasting technologies and the divergence of different ways of delivering and storing media. Consumers are overwhelmed by new electronic gadgets appearing every year. They are astonished by new technical innovations that are being designed to ease their life and change their habits. Even the broadcasting sector itself is facing significant changes, especially a growing competition between the private and public sector. This article reviews the current status of analog and digital broadcasting technologies. It analyzes a case study of user expectations related with today’s digital media, particularly radio transmission. We discuss the principal possibilities, limitations and user expectations related with digital audio broadcasting, as well as the economic, technological, regulatory and frequency management factors

Radio Broadcasting in Europe: the Search for a Common Digital Future

Europe’s radio is also characterised by a long history of being defined and driven by the state, in highly centralized fashion in the case of countries such as France (Meadel 1994), or indeed in former totalitarian regimes of Eastern Europe (Paulu 1974), and along more federal or devolved lines in countries such as Germany, Switzerland and the Netherlands (Kuhn 1985). The development of state broadcasting monopolies in most European countries, established in the early years of the twentieth century following the invention of sound broadcasting, has ensured that there is an enduring shared common ideological approach to radio broadcasting, which now finds expression in the field of digital radio policy

New Media Technologies in Europe: the Politics of Satellite, HDTV and DAB

It has been lhe tradition in Europe to develop media technologies at national level with close cooperation between the state and the private sector, and frequently with competition between different states and their industrial Infrastructures. The creation of new technologies mostly occurred within lhe electric, and later the electronics industry and included studio equipment, transmitters and receivers; it also included those industries supplying equipment to areas such as telecommunications. optics and the aerospace indus try. The state has always provided some of the central players. for example, Post Office administrations (Telecoms), research ministries, the military sector and in particular, the public service broadcasters

COMPARISON OF THE PARAMETERS OF SIGNALS WITH EXTERNAL ILLUMINATION FOR SUPERVISION OF THE AREA FOR THE PROTECTION OF IMPORTANT STATE OBJECTS

In modern conditions, it becomes necessary to create security systems, surveillance systems, anti-terrorist systems that carry out covert detection and surveillance of small-sized ground objects, including biological ones. Traditionally used single-position radars are ineffective in conditions of a large number of reflections that interfere with and low speed of movement of detected objects (people). The use of several such radars is impractical due to their rather high complexity and cost. In addition, it is impossible to ensure the secrecy of such systems. The construction of radar surveillance systems in the form of semi-active bistatic, including educational, radar systems is promising for the described conditions. One of the important issues in the construction of semi-active bistatic systems is the substantiation of the parameters of external illumination signals and the assessment of the attainable characteristics of such systems when using them. The analysis and definition of the requirements for the characteristics of the illumination signals is carried out. In addition, consider the features of using signals from modern emitting systems in semi-active radars. The basic parameters of the signals are given – the bandwidth, the pulse duration (spectrum width), the power at the transmitter output, the frequency range in which the system operates. The advantages and disadvantages of semi-active radar stations (SA RS), which use such signals, are described. Variants of semi-active bistatic systems with external illumination are determined. The widespread use of modern digital language and telecommunication systems provides the SA RS with effective illumination signals with good correlation properties, which makes it possible to obtain the necessary technical characteristics in a variety of application condition

ESA personal communications and digital audio broadcasting systems based on non-geostationary satellites

Personal Communications and Digital Audio Broadcasting are two new services that the European Space Agency (ESA) is investigating for future European and Global Mobile Satellite systems. ESA is active in promoting these services in their various mission options including non-geostationary and geostationary satellite systems. A Medium Altitude Global Satellite System (MAGSS) for global personal communications at L and S-band, and a Multiregional Highly inclined Elliptical Orbit (M-HEO) system for multiregional digital audio broadcasting at L-band are described. Both systems are being investigated by ESA in the context of future programs, such as Archimedes, which are intended to demonstrate the new services and to develop the technology for future non-geostationary mobile communication and broadcasting satellites