On the Outage Performance of Overlay Cognitive STBC-NOMA System With Imperfect SIC

Shailendra Singh, Matadeen Bansal

2021IEEE Wireless Communications Letters19 citationsDOI

Abstract

This letter investigates an overlay cognitive Alamouti’s space-time block code-aided non-orthogonal multiple access (STBC-NOMA) system. Approximate closed-form expressions for the system throughput (ST) and the outage probability (OP) of both the primary and secondary networks under imperfect successive interference cancellation (SIC) are derived over Rayleigh fading channels. Moreover, asymptotic expressions of the ST and OP at high signal-to-noise ratio (SNR) regime are also evaluated. It is shown that the proposed system outperforms the system presented by Liping <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">et al.</i> (2020), in terms of both the ST and OP. The letter further investigates the impact of power allocation coefficients on the OP.

Topics & Concepts

Space–time block codeRayleigh fadingComputer scienceImperfectNomaCognitive radioOverlayInterference (communication)Single antenna interference cancellationSignal-to-noise ratio (imaging)Block codeAlgorithmFadingThroughputTopology (electrical circuits)TelecommunicationsMathematicsWirelessDecoding methodsCombinatoricsTelecommunications linkChannel (broadcasting)Programming languageLinguisticsPhilosophyAdvanced Wireless Communication TechnologiesSatellite Communication SystemsOptical Wireless Communication Technologies