MILLIMETER-WAVE PERSONAL SATELLITE COMMUNICATION-SYSTEM

This paper describes the system concept of a millimeterwave personal satellite communication, which includes the configuration of the communication system, the satellite system, and the earth terminal system. The system has a large channel capacity and achieves high performance through a flexible channel set-up method, efficient frequency reuse, and onboard communication equipment such as a baseband channel switching processor and a modulator and demodulator (Modem). Two examples of communication systems are shown, in which the information bit rate, the number of multi-beams, and the antenna diameters are different. On the assumption that a 2 ton class satellite will be used, rough estimates are made of the size, weight, and power consumption of the onboard communication system and bus system of the satellite. In addition, details are given regarding the specifications and performance of trial productions of communication equipment such as the switching processor, the Modem, the TWTA, and the LNA. Finally, the key technical issues for establishing a millimeterwave personal satellite communication system are also discussed.