A study of user link for CDMA global multimedia low Earth orbit satellite system

This paper deals with the configuration of the service link and proposes a CDMA based multimedia transmission scheme for the up link of the next generation low Earth orbit satellite (NeLS) system. To realize the proposed NeLS system, this paper deals with service link part, and proposes QS-CDMA as a candidate for the uplink multiple access method. In order to simplify the initial acquisition and synchronization scheme to establish connection, the position information of the user terminals is assumed to be known. The required accuracy of the position information is evaluated.