Abstract
Recent advances in satellite communication technologies in the tropical regions have led to significant increase in the demand for services and applications that require high channel quality for mobile satellite terminals. Determination and quantification of these requirements are important to optimize service quality, particularly in the Malaysian region. Moreover, the tests on current satellite propagation models were carried out at temperate regions whose environmental characteristics are much different from those in Malaysia. This difference renders these propagation models inapplicable and irrelevant to tropical regions in general. This paper presents the link characteristics observations and performance analysis with propagation measurements done in tropical region to provide an accurate database regarding rain and power arches supply (PAs) attenuations in the tropics for mobile scenarios. Hence, an extension for improving the performance assessment and analysis of satellite/transmission has been achieved. The Malaysia propagation measurement for mobile scenario (Malaysia-PMMS) enables first-hand coarse estimation and attenuation analysis, because the attenuation resulting from rain and PAs becomes easily amenable for measurement. Parallel to that, the measured attenuation has been compared with that of the simulated output at noise floor level. The underlying analytical tool is validated by measurements specific at tropical region, for dynamic model of mobile satellite links operating at higher than 10 GHz.
Highlights
There are many satellites orbiting the earth, which help us in communications
The train gets close to the power arch’s area; the obstacle enters the first Fresnel zone, which is about 2 m away from receiver antenna, where its width is around 44 cm and no free space conditions can be assumed
The knife-edge diffraction is represented by the ratio between the received field in the presence of obstacle and that in the free space
Summary
There are many satellites orbiting the earth, which help us in communications. The role of satellite communications in our day-to-day life keeps on increasing [1]. The microwave signals used in satellite communication are of high frequency. The increasing demand of satellite technology that utilizes high frequency microwaves has increased the need for wide bands [3]. Operation of high frequency bands, such as the Ku-band, for satellite communications has many advantages. It relieves congestion in the lower frequencies shared with terrestrial links. It exploits larger bandwidths available at higher frequencies. It enables cheaper implementation of spectrum conservation techniques with more efficient use of the geostationary curve [4, 5]. Owing to troposphere-based impairment, the propagation channel of mobile application is strongly affected by shadowing or scattering
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