Frequency Spectrum

Electromagnetic spectrum, used for radio communications, radio frequencies spectrum, is in the range of 9 kHz to 300 GHz and represents a limited and highly valuable resource, especially if taking into account the large number of systems and services that function and that dispute portions of the spectrum. Therefore, to ensure its effective use is necessary to plan how to use it. It management is carried out on two fronts: between services and between operators. Regulating the use of radio spectrum is done globally and regionally (eg continental) through international conferences. Within each country, the use of radio spectrum management is carried out by national regulatory authorities on the basis of applied decisions taken in international conferences.

The technologies used in radio broadcasting, in fixed and mobile communications at mondial and european level are diversifying and becoming more complex and the offered services are  more numerous what involve the need to allocate the some new portions of available spectrum too, as well as the redistribution of previously occupied frequency bands, according to new needs and in the reduction or termination conditions of some services (eg the transition of audio broadcasting and television from analogic to digital).

The research-development activities from INSCC approached diverse aspects of the use of radio frequencies spectrum. It approached general problems of the use of radio frequency spectrum as well as typical aspects of some radio communications systems.

 

 

INSCC implication

The research activities of INSCC in the field are different, for example:

  • Impact of new techniques and wireless technologies on the  structure and evolution of National Table of Frequency Bands Assignment – TNABF and proposels for bringing up-to-date of this in concordance with mondial and european evolutions.
  • Dynamic utilization analysis of resources of which dispose wireless communications systems (power, bandwidth of radio frequency channel) for results optimization and for quality and safety transmission ensurance.
  • Dynamic utilization analysis of radio frequency spectrum through temporary occupacy of some unused spectrum section by the system with low transmission powers, cognitive radio and software radio.
  • Dynamic utilisation analysis of radio frequency spectrum in the frame of some systems, eg cellular, through redistribution of band available funds alloted to system towards areas found in deficit – cooperative radio.
  • The impact of new techniques and wireless technologies on the structure and evolution of National Table of Frequency Bands Assignment – TNABF.
  • Methodology for optimization of radio frequency channel in wireless access network.
  • Study of characteristics and facilities of cognitive radio technology.
  • Realisation of  a study regarding „Impact of new techniques and wireless technologies on the structure and evolution of National Table of Frequency Bands Assignment – TNABF”, study achieved for MSI, finalized in 2009.
  • Realisation of a study about cognitive radio.

Some research works:

Research activity in INSCC generated projects as:

  • The impact of new techniques and wireless technologies on the structure and evolution of National Table of Frequency Bands Assignment – TNABF.
  • Methodology for optimization of radio frequency channel in wireless access network.
  • Study of characteristics and facilities of cognitive radio technology.

 Some results obtained as consequence of developed projects:

  • Realisation of  a study regarding „Impact of new techniques and wireless technologies on the structure and evolution of National Table of Frequency Bands Assignment – TNABF”, study achieved for MSI, finalized in 2009.
  • Realisation of a study about cognitive radio.

  

Books:

Radio cognitiv (Cognitive radio), Ștefan-Victor Nicolaescu, Ed Printech, 2013, ISBN 978-606-23-0009-8

2011 Frequency spectrum - inscc. Copyright © 2014 INSCC.
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