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Telekomunikacja i Techniki Informacyjne (TiTI) - 3/2013

Andrzej Hildebrandt
Od Redaktora Naczelnego
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Laudacja
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Jubileusz 80-lecia urodzin prof. Ryszarda Strużaka
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Ryszard Strużak
Microcomputer modelling, analysis and planning in terrestrial television broadcasting
This article describes a simulation model of a national network of television broadcasting stations. The performance of a station depends on its sitting and its antenna, on its radiated power and frequency, and on surrounding terrain and electromagnetic environment. All these factors can be analysed using the simulation model. Simulation can help in the maintenance of the existing television stations and in the planning of new stations by making “what-if” considerations fast, simple and effective. The simulation model has been developed as an engineering aid in planning the low-power rebroadcasting stations.
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On future information system for management of radio frequency spectrum resource
This article attempts to outline an information system that will provide data for decision-making by governments, their contractors, international consortia, private companies, and other entities interested in radiocommunications. The proposed system will harmonize national and international radio frequency spectrum management, and will integrate the existing computer resources within one computer network. It will contain the complete data on current use of radio frequencies around the world and offer specialized computer tools to facilitate the technical coordination analyses required when a new radio station is proposed. The system will help to manage the radio frequency spectrum resources and to satisfy the increasing frequency demand for new radio services and systems. It will affect strongly the spectrum management, independently of any other reform such as simplification of the International Telecommunication Union (ITU) Radio Regulations. The new system will be the expected " next step" after the decisions of the recent Additional Plenipotentiary Conference (APP-92). After presenting the background, we discuss current problems in radio frequency spectrum management such as the role of new partners, fragmentation and inefficiency. Section 3 outlines the concept of the system. Comments on implementation are given in section 4 and concluding remarks in section 5.
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Spectrum Management. Part 1
As preparations for the Year 2000 World Radiocommunication Conference continue in earnest, ITU News will bring you in-depth analyses of what is at stake in the complex radio world. Indeed, how the spectrum/orbit resources are used and managed has a profound impact on society, its prosperity, security, culture, and education. This article takes you back in history on the use, management and regulation of the radio frequency spectrum resources. It then discusses current trends.
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Spectrum Management. Part 2
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Spectrum Management. Part 3
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Ryszard Strużak
Flexible Spectrum Use and Laws of Physics
This note refers to flexible-use spectrum rights that would allow the radio frequency spectrum to be traded, aggregated, divided and freely used for a wide range of user-selected services. So far, discussions on that approach have largely focused on economic aspects, without due consideration of physical realizability. We argue here that additional spectrum management rules are required to assure compatible coexistence of radio systems in congested environments.
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