Interference analysis of fixed terrestrial microwave LOS/NLOS radio links

Abstract

In this study, interference modelling is investigated for fixed terrestrial microwave LOS (line-of-sight)/ NLOS (transhorizon) radio links operating in NATO Band 3+ (1350-2690 MHz) and NATO Band 4 (4400-5000 MHz) frequency bands. The calculation of the interference due to both clear-air and hydrometeor scattering interference mechanisms are made for the interfered-with receiver stations of fixed terrestrial point-to-point systems. Moreover, interference propagation mechnasims of the calculation of the clear-air interference basic transmission loss mentioned in the Rec. ITU-R P. 452 are examined. Interference analysis for several microwave radio links are analyzed using the interference propagation parameters such as interfering transmitter and interfered-with receiver station coordinates, antenna heights above ground level, antenna discrimination, polarization, radio refractivity index lapse, sea-level surface refractivity, time percentage for which the calculated basic transmission loss is not exceeded, clutter information, digital terrain elevation and climate data. © 2015 IEEE.