Radio frequency spectrum management
The radio frequency spectrum is considered to be the wealth of nature. Taking the limited amount of these resources into consideration, access to the spectrum has to be managed at national and international level. One of the main elements of the radio frequency spectrum management system is radio monitoring and radio spectrum management, the successful performance of which ensures the efficient operation of the radio monitoring system. Radio monitoring offers exhaustive information regarding the electromagnetic situation, which is necessary for making decisions on activities in order to improve the efficiency of the radio frequency spectrum and to ensure conditions for the normal licensed operation of radio communication. Radio monitoring and management of the utilization of the radio frequency spectrum are mutually related phenomena and nowadays they cannot stand alone in the radio communication space.
Techniques of radio monitoring and direction-finding are used for the rapid discovery of radio interference, and radio monitoring is one of the stages in solving the task of frequency assignment. Using a theoretical calculation of the electromagnetic situation together with radio monitoring data allows the optimization of frequency assignment, taking into consideration radio frequency spectrum occupancy, and also increases the efficiency of management of the utilization of the radio frequency spectrum.
In Latvia, management of all technical activities that are related to the management of the utilization of the radio frequency spectrum, radio monitoring included, is performed by joint-stock company Spectrum Supervision Department of the Electronic Communications Office. It uses a suitable technical platform to ensure the fulfilment of radio frequency spectrum monitoring tasks, including several equipped mobile radio monitoring laboratories, each with different functions, for carrying out measurements.
The mains tasks of the Spectrum Supervision Department are: transmitter radiation measurements and control, control of the radio frequency spectrum and channel occupancy, detection of unregistered users of the spectrum, measurements for determination of the coverage area of transmitters and antenna patterns, expert measurements of electromagnetic compatibility in the areas of radio and television broadcasting transmitter installation, finding out causes of radio interference in receiving radio and television programmes, as well as interference in radio communication, inspection of clients or examination of utilization parameters of radio equipment in the places of its exploitation, etc.