Novel mitigation technologies for rain attenuation in broadband satellite communication system using from Ka- to W-band

Some examples of novel rain attenuation mitigation technologies for future high-speed satellite communication or broadcasting systems using Ka-band radio wave or above bands such as Q-, V- and W-bands are proposed. As regards adaptive satellite power control and time diversity methods, effects of those methods are shown quantitatively. In these analyses rainfall rate data in Japan and Indonesia, and slant-path attenuation data at 19.5GHz measured for over 8 years in Japan are used. Importance of spatiotemporal properties of rainfall rate such as time- and space-correlation is mentioned for quantitative analysis of the effects of future powerful attenuation mitigation technologies.