Site diversity

Site diversity

Site diversity is a technique to limit the effect of rain fade in
satellite communications, mainly in the Ka band. The downlink transmissions ofsatellites cover very large areas, that will have different weather. The sitediversity technique consists of linking two or more ground stations receivingthe same signal: this way, if the signal is heavily attenuated in one area,another ground stations can compensate it. These intense rain areas oftenhave a horizontal length of no more than a few kilometres: putting theground stations at a sufficient distance the possibility of rain fade in thedownlink signal will be reduced.

The configuration works when the attenuation is not as great as the twostations simultaneously as it is at one of them, and this is usually a validassumption.

Site diversity systems have been known to minimize disruption of service by major satellite carriers.

ee also

*Diversity scheme
*Diversity combining


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