Noise Reduction and Signal Path Loss Analysis of Fm Transmission in Hilly Terrain of Nepal: Case Study of Dolakha
Year: 2025
Type: article
Abstract: This paper investigates the effects of terrain-induced signal loss on FM radio transmission for community radio stations operating in the hilly regions of Nepal, with a specific focus on Dolakha district. Using terrain profiling through Google Earth and signal modeling with Free Space Path Loss (FSPL) along with knife-edge diffraction loss assumptions, we simulate the received signal strength at various distances from a 100 MHz FM transmitter in Charikot. The results demonstrate critical signal degradation in NLoS areas due to terrain obstructions. Based on the findings, repeater stations and directional antennas are recommended to optimize signal delivery in shadowed zones. Received: July 7, 2025Accepted: July 23, 2025
Author: Diwakar Paudel
Institution: Kathmandu University
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414247028
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