THE RADIO NOISE EFFECT ON THE COVERAGE AREA OF DRM BROADCAST TRANSMITTER IN DIFFERENT REGIONS

• Main Author: Varlamov, Oleg
• Format: Text
• Language: unknown
• Published: Общество с ограниченной ответственностью Издательский дом Медиа паблишер 2015
• Subjects: Norilsk; Tiksi; norilsk
• Online Access: http://cyberleninka.ru/article/n/the-radio-noise-effect-on-the-coverage-area-of-drm-broadcast-transmitter-in-different-regions; http://cyberleninka.ru/article_covers/15713888.png

Digital Radio Mondiale (DRM) is universal, openly standardised digital broadcasting system for all broadcasting frequencies, including LW, MW, SW as well as band I, II (FM band) and III. Present article focuses on effect of atmospheric radio noise on the service area in different regions in the day time (i.e. by ground wave) in LW and MW bands. Values of maximum expected field strength of atmospheric radio noise exceeded for 2% of the time estimations have been done for different frequencies of LW and MW bands (in the bandwidth of 10 kHz) for different geographical locations (Tiksi, Norilsk, Moscow region, Ho Chi Minh City rural area excluding city). The obtained results substantiate the purpose to incorporate the atmospheric radio noise in coverage area calculation of DRM transmitter and described the methodology of calculation. The using of "SNR propagation curves" is also proposed. There are shown examples that make it possible to select the preferred frequency for various geographical conditions. So, frequencies preferred for using in DRM are: Lower part of the LW band in northern latitudes; Lower and middle parts of the LW band in middle latitudes; Upper part of the LW band in tropical regions. The conducted analysis of radio noise effect in different geographical regions allows to calculate more accurately the coverage area and to choose the preferred frequency for maximum coverage. Digital Radio Mondiale (DRM) is universal, openly stan-dardised digital broadcasting system for all broadcasting fre-quencies, including LW, MW, SW as well as band I, II (FM band) and III. A large number of successful trials and regular broadcasting was carried out in LW and MW bands in various countries including the Russian Federation [1]. However, some aspects of the correct calculation of the DRM transmitter service area are not clear for part of the broadcasters up to now. Present article focuses on effect of radio noise on the service area in different regions in the day time (i.e. by ground wave) in LW and MW bands. The conducted analysis of radio noise effect in different geographical regions allows to calculate more accurately the coverage area and to choose the preferred frequency for maximum coverage.