{"id":631,"date":"2025-03-27T23:01:12","date_gmt":"2025-03-27T23:01:12","guid":{"rendered":"https:\/\/www.itu.int\/160\/?page_id=631"},"modified":"2025-06-25T20:08:50","modified_gmt":"2025-06-25T20:08:50","slug":"partner-giprosvyaz-belarus-resilience","status":"publish","type":"page","link":"https:\/\/www.itu.int\/160\/vision\/partner-insights\/partner-giprosvyaz-belarus-resilience\/","title":{"rendered":"ITU160 Partner submission: Giprosvyaz, Belarus"},"content":{"rendered":"
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Improving radio transmission in forests<\/h1>\n<\/div>\n\n
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Submitted by: <\/em><\/p>\n<\/div>\n\n

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Dmitry Valentinovich Zanevsky, Associate Professor and Senior Researcher
Open Joint Stock Company Giprosvyaz, Belarus<\/h4>\n<\/div>\n\n
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\n \u201cConnectivity for all\u201d sometimes lies in the details.

In our region, forests pose the primary obstacle to radio communication. Currents flow over the Earth\u2019s continuously curved surface. However, the geometry of treetops significantly differs. <\/p>\n

\n Improving radio transmission in forests <\/h3>\n

\n While researchers have addressed radio wave diffraction over the Earth’s surface, forests remain underexplored. As a result, forests modeled as an “opaque Earth surface” do not yield satisfactory results.

The main objective in calculating a line-of-sight radio link is to determine optimal antenna heights. In practice, new antenna masts are expensive. Consequently, organizations install antennas on rooftops, existing high structures, or pre-existing towers.

Our research focuses on methodology to calculate radio wave attenuation in small forest areas, considering both direct and diffracted radio waves at treetop level.

ITU recommendations for calculations are based on the radio link’s frequency range, including ITU P.530-18, ITU P.2001-4, ITU P.452-17, and ITU P.1812-6.

These recommendations mostly do not account for buildings or vegetation, though some include nearby structures and vegetation that screen terminal antennas. Only ITU P.1812-6 suggests “raising” the terrain profile by a “typical” forest or building height. This “typical” height is always lower than the actual height, as it accounts for radio wave propagation over vertical and horizontal obstacles. Statistical data from practical measurements determines calibration coefficients for specific areas.

To solve this problem, direct radio wave losses are accounted for according to ITU P.833-10, which provides statistical data on wave attenuation through forests. <\/p>\n

\n Testing wave losses over treetops <\/h3>\n

\n Three models are being tested to determine wave losses. Their applicability is being assessed by collecting statistical data that measures the receiver\u2019s signal power and the number of outages exceeding 10 seconds. The models are: <\/p>\n

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  • Wedge-shaped obstacles.<\/strong> The forested area is represented as two wedge-shaped obstacles at its beginning and end along the radio link. Losses are calculated per ITU P.526-15.<\/li>\n<\/div>\n\n
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  • Single-mode transmission. <\/strong>The forested area is represented as a slowing system in a single-mode transmission line. Loss calculations are based on the theory of eigenwaves in transmission lines.<\/li>\n<\/div>\n\n
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  • Intermediate approach. <\/strong>The forest is represented as several uniformly spaced, wedge-shaped obstacles along the radio link.<\/li>\n<\/div><\/ul>\n<\/div> <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n\n
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    Tips for stable radio<\/h3>\n<\/div>\n\n
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    Improving stable radio communication is key to ensuring connectivity for all. It requires continuous radio wave propagation research, using models that describe real-world problems across a broad frequency range and account for climate variations.
     
    This is only achievable through close collaboration with ITU, which unites regional researchers working on similar issues, compiles statistical data, and incorporates suitable models into new recommendations.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n\n

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    Disclaimer: The views expressed in this article are those of the author(s) and do not necessarily reflect the views of ITU or imply endorsement.<\/em><\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Improving radio transmission in forests Submitted by: Dmitry Valentinovich Zanevsky, Associate Professor and Senior ResearcherOpen Joint Stock Company Giprosvyaz, Belarus Tips for stable radio Improving stable radio communication is key to ensuring connectivity for all. It requires continuous radio wave propagation research, using models that describe real-world problems across a broad frequency range and account […]<\/p>\n","protected":false},"author":5,"featured_media":902,"parent":645,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-631","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/pages\/631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/comments?post=631"}],"version-history":[{"count":0,"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/pages\/631\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/pages\/645"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/media\/902"}],"wp:attachment":[{"href":"https:\/\/www.itu.int\/160\/wp-json\/wp\/v2\/media?parent=631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}