16 Spot beam Ka-band satellite communication in India for rain fade mitigation

The frequency band of 26.5-40 GHz is used for Ka-Band communication which includes wide band multimedia services, mobile information systems, SPACELAN, e-Commerce and high bandwidth internet using high capacity for more user demand. But communication in this high frequency is more susceptible to rain attenuation which degrades the link quality and decreases the signal to noise ratio mainly in tropical regions. In this paper we have proposed rain fade mitigation using spot beam technology. Here India is divided in to 16 spot beam locations and we have used multi beam coverage using multi port power amplifiers for the proposed technique where dynamic power allocation to the beams occurs depending upon the traffic. It will compensate the rain attenuation of one beam by sharing unused power from the other beams. The payload architecture of the 16 spot beam coverage using MPA has been designed for the proposed technique. This technique does not require any additional transmit power and does not cause any additional traffic burden.