Mobile communication system with a hybrid phased array antenna system

This paper presents Low Earth Orbit (LEO) mobile communication system features, analyzes its advantaged and disadvantages, discusses space division multiple access technology as one of the important research areas involved in their development, configuration, maintenance, operation and management. In LEO satellite the problem of huge system capacity and simultaneous communications between many single or multipoint mobile users can be solved by using a well-known beamforming. However common digital beamforming technology consumes a lot of the satellite´s power to create a very narrow beams while resources of the satellite systems are limited. In this paper, a tradeoff between digital beamforming and analog beamforming are investigated for the purpose of providing a huge system capacity in limited satellite resources.