Changes between Version 46 and Version 47 of Manual/PropagationModels/Introduction


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Timestamp:
06/26/14 14:48:54 (3 years ago)
Author:
jean-philippe
Comment:

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  • Manual/PropagationModels/Introduction

    v46 v47  
    2020 
    2121 ||= Model =||= Frequency Range =||= Distance Range =||= Typical Application Area =|| 
    22  ||[wiki:Manual/PropagationModels/P1546 ITU-R P.1546 model (ITU-R Rec.P.1546-1 and ITU-R Rec.P.1546-4 available in SEAMCAT)]||30 MHz - 3 GHz||1-1000 km||Broadcasting and other terrestrial services, typically considered in cases with high mounted transmitter anttena (e.g. above 50-60 m). '''Note''' that ITU-R Rec.P.1546-4 proposes a solution where values of distances less than 1 km may occur and where short-range propagation model is not practicable and a simple means is required to converge towards free-space field strengths for arbitrarily short distances (see section 14 of ITU-R Rec.P.1546-4).|| 
     22 ||[wiki:Manual/PropagationModels/P1546 ITU-R P.1546 model (ITU-R Rec.P.1546-1 and ITU-R Rec.P.1546-4 available in SEAMCAT)]||30 MHz - 3 GHz||1-1000 km||Broadcasting and other terrestrial services, typically considered in cases with high mounted transmitter anttena (e.g. above 50-60 m). '''Note''' that ITU-R Rec.P.1546-4 proposes a solution where values of distances '''less than 1 km''' may occur and where short-range propagation model is not practicable and a simple means is required to converge towards free-space field strengths for arbitrarily short distances (see section 14 of ITU-R Rec.P.1546-4).|| 
    2323 ||[wiki:Manual/PropagationModels/ExtendedHata Extended Hata model]||30 MHz - 3 GHz||Up to 40 km||Mobile services and other services working in non-LOS/cluttered environment . Note that in theory, the model can go up to 100 km since the curvature of the earth is included, but in practice it is recommended to use it up to 40 km.|| 
    2424 ||[wiki:Manual/PropagationModels/ExtendedHata Extended Hata-SRD model]||30 MHz - 3 GHz||Up to 300 m||Short range links under direct-LOS assumption, '''important: antenna heights up to 3 m'''||