The constant demand for increased capacity of communication channels has led the SATCOM industry to develop new satellite systems operating at frequencies above 20 GHz where large bandwidths are available (EHF band – Extremely High Frequencies). Nevertheless, attenuation effects of atmospheric gases, clouds and rain can reach significant levels at these frequencies and it is no longer cost-effe...

Short Title: Prediction of Link Diversity Statistics. Abstract The average annual rain attenuation statistics experienced by individual microwave links are well understood. ITU-R models exist for the prediction of these statistics and they are used to assign power levels to links to achieve the desired availability. The performance of networks such as mulit-hop links or links utilising route, f...

An experiment has been conducted to evaluate micro scale site diversity (MSD) at Ahmedabad, a tropical site in India. Rain data is collected by a linear array of tipping bucket rain gauges during 2007 and 2008 monsoon periods. Spatial variation of rain fall has been studied with the help of joint probability and correlation coefficients derived for the collected data. The results support the ex...

The rain attenuation plays a major role in the design of satellite-to-earth links operating at high frequencies such as Ka band and Ku band. The signal suffers from a strong attenuation during the propagation path as raindrops absorb and scatter radio waves, which results in an increase of transmission error and reduction of the system availability [1]. Predicting rain attenuation is one of the...

Electromagnetic wave propagation research in frequency band 58GHzwas started at TESTCOM in Praha due to lack of experimentally obtained results needed for a realistic calculation of quality and availability of point-to-point fixed systems. Rain attenuation data obtained from a path at 58GHz with V polarization located in Praha was processed over a 5-year period. Rainfall intensities have been m...

Rain cell size is an input requirement for rain-induced attenuation studies. It is useful in estimating the extent of a given radio link path that will traverse the rain medium in a given rain event. The “Synthetic Storm” approach, which requires 1-minute integration time data, is used to derive the proposed rain cell sizes for various climatic zones within South Africa. The conversion of the r...

The 21-GHz satellite broadcasting enables to transmit high-capacity information such as ultrahigh-definition TV, 3D-TV and so on. However, the 21.4 to 22.0-GHz band suffers from considerable rain attenuation. In order to compensate it, the studies about a rain fade mitigation techniques have been done. One of the techniques proposed by NHK Science and Technical Research Laboratories is an adapt...

Attenuation due to rain is an important constraint in the designing of the microwave communications links operating in Malaysia especially at frequencies above 10 GHz. In recent studies, the ITU-R proposed models for the prediction of rain attenuation give a good estimation for the microwave propagation loss caused by rain for the temperate regions but it underestimates the rain attenuation pre...

In this paper satellite wave propagation at Ku and Ka band is considered. The design and simulation of a typical satellite beacon receiver at Ka band is designed and simulated for the future works. Also rain attenuation prediction at Ku band using satellite signal beacon measurement and simulations for Iran Telecommunication Research Center (ITRC) are presented. The measurement setup consists o...

Issue No. 2, Fall 2002 www.spacejournal.org Page 1 of 29 A Prediction Model that Combines Rain Attenuation and Other Propagation Impairments Along EarthSatellite Paths Asoka Dissanayake, Jeremy Allnutt, Fatim Haidara Abstract The rapid growth of satellite services using higher frequency bands such as the Ka-band has highlighted a need for estimating the combined effect of different propagation ...