Research on VHF system design for river navigation in mountainous canyons
Very High Frequency(VHF)is currently an internationally recognized communica-tion method for ship navigation,dispatch and command,and emergency rescue.In recent years,VHF has achieved good coverage and application effects in coastal areas.However,estab-lishing a VHF communication network in river channels within mountainous canyons has al-ways been a challenge for technical personnel.It is difficult to achieve efficient and stable cov-erage requirements solely based on conventional site selection,construction density,antenna height,coverage range,radio power configuration,antenna specification selection,and other technologies.Therefore,in order to solve the problem of networking river channels in moun-tainous canyons,this article proposes a design scheme that combines omnidirectional antenna,directional antenna,and ship borne antenna by analyzing the current problems and related influ-encing factors.This plan fully utilizes the resources of high-level communication base stations and channel working ships of operators along the route,effectively improving the VHF cover-age and communication quality of river channels in mountainous canyons,and ensuring the safety of ship navigation.
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