Terrestrial Relay‐Aided Cooperative High Throughput Satellite Systems. (10th February 2020)

• Record Type: Journal Article
• Authors: Sirigina, Rajendra Prasad; AS, Madhukumar; Bowyer, Mark
• Is Part Of: International journal of satellite communications and networking. Volume 38:Number 3(2020)
• Page Start: 284
• Page End: 300
• Publication Date: 2020-02-10
• Subjects: decode‐and‐forward relay -- dual satellite system -- full frequency reuse -- zero‐forcing precoder; Artificial satellites in telecommunication -- Periodicals; Digital communications -- Periodicals; 621.3825
• DOI: 10.1002/sat.1332
• Languages: English
• ISSNs: 1542-0973

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. Abstract : A cooperative precoding algorithm is proposed to mitigate inter spot beam and intra spot beam interferences in dual satellite systems. The relay‐aided dual satellite system is also proposed to mitigate the inter spot beam and intra spot beam interferences of users at the edge of spot beams. The achievable rate regions of cooperative precoding and decode‐and‐forward relay‐aided dual satellite systems are characterized.