P.1812-4-2015

A path-specific propagation prediction method for point-to-area terrestrial services in the VHF and UHF bands


 

 

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标准号
P.1812-4-2015
发布日期
2015年07月01日
实施日期
2015年08月11日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
ITU-R - International Telecommunication Union/ITU Radiocommunication Sector
引用标准
37
适用范围
This Recommendation describes a propagation prediction method suitable for terrestrial point-to-area services in the frequency range 30 MHz to 3 GHz. It predicts signal levels at the median of the multipath distribution exceeded for a given percentage of time@ p%@ in the range 1% ??p ??50% and a given percentage of locations@ pL@ in the range 1% ??pL ??99%. The method provides detailed analysis based on the terrain profile. The method is suitable for predictions for radiocommunication systems utilizing terrestrial circuits having path lengths from 0.25 km up to about 3 000 km distance@ with both terminals within approximately 3 km height above ground. It is not suitable for propagation predictions on either air-ground or space-Earth radio circuits. This Recommendation complements Recommendation ITU-R P.1546.




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