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In this paper, gaseous attenuation along a Ka-band slant path link is investigated and analyzed for the tropical country of Singapore. The signal is chosen at a frequency of 18.9 GHz with an elevation angle 44.5°. In order to estimate the gaseous attenuation along this slant path, Recommendation ITU-R P.676-10 model is applied. Four-year gaseous attenuation is processed and analyzed. The results show...
Statistical modeling of rainfall induced temporal variations in a foliage channel at VHF frequency is performed in this paper. With the help of the Akaike weight omegaj, Weibull and Rayleigh functions are identified as the two suitable models to describe the tap amplitude variations. The Weibull function is then used as the channel model to analyze the rainfall induced temporal variations in a foliage...
In this paper, the rainfall is found to have distinct effect on various parts of the propagating components for the VHF radio wave propagation in a tropical forest. By the studies of the measured power delay profiles under different weather conditions, it is observed that the lateral wave is the dominant mode of the VHF propagation and is not affected by the presence of rain as it is similar to free...
This paper presents a wideband measurement and characterization of a tropical forested channel. Complex channel impulse response measurements were carried out at 240 MHz for static transmit and receive antennas. Measured power delay profiles indicate significant multipath components following the dominant propagating wave. Relevant parameters such as RMS delay spread, Rician K factor et al. have been...
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