Performance Analysis for a Fully Decentralized Transmit Power Allocation Scheme for Relay-Assisted Cognitive-Radio Systems

TitlePerformance Analysis for a Fully Decentralized Transmit Power Allocation Scheme for Relay-Assisted Cognitive-Radio Systems
Publication TypeConference Paper
Year of Publication2008
AuthorsMietzner, J., L. Lampe, and R. Schober
Conference NameGlobal Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Pagination1 -6
Date Publishednov.
Keywordsbest effort strategy, cognitive radio, fully decentralized transmit power allocation, performance analysis, primary receiver, radio receivers, relay assisted cognitive radio systems, signal-to-noise-plus-interference ratio
Abstract

We analyze the performance of a fully decentralized (FD) transmit power allocation (TPA) scheme for relay-assisted cognitive-radio (CR) systems. In particular, we assume that the frequency band chosen by the CR relay network for unlicensed spectrum usage overlaps with an active primary narrowband link. The considered FD-TPA scheme maximizes the signal-to-noise-plus-interference ratio at the destination node of the CR network according to a best-effort strategy, while limiting the interference experienced by the primary receiver. Numerical performance results show substantial improvements compared to non-cooperative transmission. Moreover, the performance of the FD-TPA scheme is close to that of the optimal centralized power allocation solution.

URLhttp://dx.doi.org/10.1109/GLOCOM.2008.ECP.724
DOI10.1109/GLOCOM.2008.ECP.724

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