The effects of satellite diversity on Ka-band rain attenuation were investigated in three propagation paths with azimuth angle separation of about 30 deg in Japan. The Ku-band (14/12 GHz) attenuation was converted to the Ka-band down-link (19.45 GHz) attenuation by the frequency scaling methods considering the difference of raindrop size distributions. As for the attenuation of 20 dB, time perc...

In this paper, the attenuation-correction methodology presented in Part I is applied to radar measurements observed by the multiparameter radar at the X-band wavelength (MP-X) of the National Research Institute for Earth Science and Disaster Prevention (NIED), and is evaluated by comparison with scattering simulations using ground-based disdrometer data. Further, effects of attenuation on the e...

The study of this paper focuses on the power angle spectrum (PAS) of the satellite communication downlink in rain environment at millimeter-wave bands. The two-dimension angle distribution expression of the incoherent intensity of the ground receiving antenna in rain is deduced in detail. The coherent intensity is discussed according to the first-order multiple scattering approximation theory. ...

Rain attenuation is one of the most dominant impairment factors that degrade the performance of satellite communications at Ka band and above. In order to solve the technical bottlenecks in the existing Ka-band satellite communication schemes, the authors has introduced the emerging Interleave Division Multiple Access (IDMA) technology into multi-beam satellite communication systems, and conseq...

The broadband fixed wireless access (BFWA) systems operate in microwave frequencies. In this frequency range, the wave propagation is highly influenced by precipitation caused especially by rain. With the use of cell site diversity (CSD), the rain attenuation effects can be mitigated. When the signal level falls below a certain threshold the subscriber station switches to another base station w...

Rain-induced attenuation of microwaves poses a serious challenge to signal availability beyond 10 GHz frequencies. The challenges are even more pronounced in the subtropical and tropical regions with high intensities rain which is accompanied thunderstorms. Nigeria has an equatorial climate, identified by controlling rainfall. Rain significant factor various communication above Therefore, for e...