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- Title
Loss Exponent Modeling for the Hilly Forested Region in the VHF Band III.
- Authors
Jawhly, Thaisa; Chandra Tiwari, Ramesh
- Abstract
Modeling forest propagation loss over a vast area is challenging, particularly for the hilly terrain regions where canopy obstacle depth varies with region. To consider such vegetation impact, we present a novel forest cover classification well defined with the line‐of‐sight (LoS). Furthermore, we incorporated the mobile antenna site elevation angle, which showed significant influence within the target frequencies selected at 182.25 and 203.25 MHz (VHF Band III). We proposed a loss exponent dependent on the elevation angle and the vegetation‐visibility classification, which is the basis of the model introduced in this paper. The resulting loss derived using this loss exponent showed a good agreement with the empirically derived loss variations. The proposed method offers easy forest classification approximations with precise determination of signal variation over a wide‐ranging forested area. Plain Language Summary: We discussed the influence of vegetation, line‐of‐sight (LoS), and elevation angle on the loss exponent of the observed data. We proposed a novel vegetation‐visibility classification combined with the elevation angle to explain signal variation in a forest vegetation area. The results indicated that the proposed loss performs decently compared to the Egli, Hata, and Perez Vega model. Key Points: Proposed vegetation‐line‐of‐sight (LoS) classification and elevation angle based loss exponentStatistical inferenceProposed path loss model for the hilly forested region
- Subjects
FOREST canopies; FOREST plants; MOUNTAINS; FORESTS &; forestry; HIGH frequency antennas
- Publication
Radio Science, 2021, Vol 56, Issue 8, p1
- ISSN
0048-6604
- Publication type
Article
- DOI
10.1029/2020RS007201