Prediction Method and Verification of Inland Waters VHF Coverage Effect Based on ITU-R P.1546-6 Modified Model

Combined with the actual conditions of VHF communication system in inland waters, the distance, frequency and antenna height of the radio wave coverage effect calculation model proposed in Recommendation ITU-R P.1546-6 are modified to obtain the VHF path loss function curve adapted to inland waters. The results of the real ship test show that the modified radio wave coverage effect prediction model can predict the coverage effect of VHF communication system better in inland waters, and has high promotion and application value.