Terrestrial Relay‐Aided Cooperative High Throughput Satellite Systems

Abstract

Summary Full frequency reuse based dual satellite system (DSS) is investigated in this work. In the case of DSS, user terminals receive inter spot beam and intra spot beam interfering signals due to the simultaneous transmission of data from both satellites. Cooperative precoding algorithm is proposed to mitigate these effects. The achievable data rates with zero‐forcing (ZF) and regularized ZF precoding algorithms are characterized. If the user terminals served by both satellites are colocated, then the proposed cooperative precoding algorithm fails because of correlated channels. To this end, relay‐aided DSS (RA‐DSS) is proposed. The achievable data rates of both full‐duplex and half‐duplex RA‐DSSs are characterized. Through simulations, it is shown that the proposed full‐duplex RA‐DSS achieves better data rate than the DSS, single satellite system, and orthogonal transmission even if the users are closely placed.

Dual Stream Transmission and Downlink Power Control for Multiple LEO Satellites-Assisted IoT Networks

“…The communication rate was better than the two-satellite GEOSC system. A full frequency reuse-based dual-satellite system was studied in [10] to achieve a high data transmission rate by designing a relay-aided decision support system. In recent years, with the development of LEO satellite techniques, the cooperative techniques between GEO and LEO satellites have attracted attention.…”