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In satellite communications with frequencies above 10 GHz generally, attenuation of the received signal due to rain cannot be mitigated. In this presentation, we paid attention to the frequency diversity as a countermeasure technique against the rainfall attenuation. First, we compared the satellite availability obtained from the time-series measurement data during rain that estimated from the state transition matrix analysis. The availability estimated, especially when the duration time t is 1 and 3 seconds, coincides well with the measured data. Next, as an application of availability estimated from the state transition matrix, we applied it to the frequency diversity technique using Ku- and Ka-band signals. Satellite communication capacity using the frequency diversity is derived from the state transition matrix quantitatively. Even if Ka-band small satellite with less transmitting power is used for the diversity, the availability can be increased if the store-and-forward communication system like the internet is assumed for satellite communication.
Date of Conference: 7-10 Dec. 2010