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Hyungjong Kim, Sungmook Lim, Hano Wang and Daesik Hong, "Optimal Power Allocation and Outage Analysis for Cognitive Full Duplex Relay Systems", IEEE Trans. Wireless Comm., Oct. 2012
[IEEE Trans. Wireless Commun.]
조회 52458
Status : | Published |
---|---|
Date : | 2012-10 |
Title : | Optimal Power Allocation and Outage Analysis for Cognitive Full Duplex Relay Systems |
Authors : | Hyungjong Kim, Sungmook Lim, Hano Wang and Daesik Hong |
Journal : | IEEE Transactions on Wireless Communications |
Abstract : | This paper investigates the use of full duplex relaying (FDR) in cognitive radio systems. Cognitive full duplex relay networks (CogFRNs) offer the advantage not only of increasing spectral efficiency by spectrum sharing but also of extending coverage through the use of relays. Concurrent transmissions at the source and relay in CogFRNs can overcome a loss of resource efficiency in a way that conventional half duplex relay (HDR) systems cannot. However, in CogFRNs, the primary user experiences interference from the secondary source and relay simultaneously due to the effects of full duplexing. Satisfying the interference constraint by simply reducing transmission power results in performance degradation for the secondary user. What is therefore needed is a way to optimize the transmission powers at the secondary source and relay. To address this need, we propose an optimal power allocation scheme based on minimizing the outage probability in CogFRNs. We then analyze the outage probability of the secondary user in the noise-limited and interference-limited environments. In addition, we also propose an outage-constrained power allocation scheme which does not require the instantaneous channel state information (CSI) for the link between the primary and secondary users. Simulation results show that the proposed schemes achieve performance improvement in terms of outage probability. |
URL : | http://ieeexplore.ieee.org/xpl/articleDe...er=6294498 |
Download : | http://mirinae.yonsei.ac.kr/?module=file...a3c64b76b6 |
Kim, Hyungjong; Lim, Sungmook; Wang, Hano; Hong, Daesik; , "Optimal Power Allocation and Outage Analysis for Cognitive Full Duplex Relay Systems," Wireless Communications, IEEE Transactions on , vol.11, no.10, pp.3754-3765, October 2012
doi: 10.1109/TWC.2012.083112.120127
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