An Efficient Precoder Structure for Dual Satellite Systems for Ubiquitous Communication

Abstract

Multiple spot beams based dual satellite system with full frequency reuse across all spot beams is considered in this work. Both satellites transmit on same frequency to improve the spectrum utilization efficiency. Cooperative Zero Forcing (ZF) and cooperative regularized ZF precoding algorithms are investigated. If the users served by both satellites are closely placed, then it is shown that the proposed cooperative precoding fails due to the ill conditioned channels. Otherwise, the proposed DSS is shown to achieve better sum-rate than orthogonal transmission scheme, where both full frequency reuse based multiple spot beam satellites transmit on different frequency bands.