Status : Presented 
Date : 2012-06 
Title : Power Allocation and Outage Probability Analysis for Secondary Users in Cognitive Full Duplex Relay Systems 
Authors : Hyungjong Kim, Sungmook Lim, Hano Wang, and Daesik Hong 
Conference : SPAWC12 
Abstract : This paper investigates the use of full duplex relaying (FDR) in cognitive radio systems. Cognitive FDR systems offer the advantage not only of increasing spectral efficiency by spectrum sharing but also of extending the coverage through the use of relays. Concurrent transmissions at the source and relay in FDR systems can overcome a loss of resource efficiency in a way that conventional half duplex relay (HDR) systems cannot. However, in cognitive FDR systems, the primary user experiences interference from the secondary source and relay simultaneously due to the 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. Therefore, we propose an optimal power allocation scheme based on minimizing the outage probability in cognitive FDR systems. We then analyze the outage probability of the secondary user in the noise-limited and interference-limited environments. Simulation results show that the proposed schemes achieve performance improvement in terms of outage probability. 
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Hyungjong Kim; Sungmook Lim; Hano Wang; Daesik Hong; , "Power allocation and outage probability analysis for secondary users in cognitive full duplex relay systems," Signal Processing Advances in Wireless Communications (SPAWC), 2012 IEEE 13th International Workshop on , vol., no., pp.449-453, 17-20 June 2012

doi: 10.1109/SPAWC.2012.6292947

keywords: {Interference constraints;Relays;Resource management;Signal to noise ratio;Strontium;Wireless communication;cognitive radio;interference (signal);multiplexing;probability;radio spectrum management;cognitive full duplex relay system;cognitive radio system;concurrent transmission;full duplexing;half duplex relay system;interference constraint;interference-limited environment;noise-limited environment;optimal power allocation scheme;outage probability analysis;outage probability minimisation;primary user experiences interference;secondary user;spectral efficiency;spectrum sharing;transmission power optimisation;}


List of Articles
Status Datesort
6 [Other Conf. Papers] Gosan Noh, Sungmook Lim, Yosub Park, Jihaeng Heo, and Daesik Hong, "Effect of Primary Power Fluctuation on Ergodic Capacity of a Secondary User in a Spectrum Sharing Environment," IEEE ICNC Feb, 2014 file Presented  2014-02 
» [Other Conf. Papers] Hyungjong Kim, Sungmook Lim, Hano Wang, and Daesik Hong, "Power Allocation and Outage Probability Analysis for Secondary Users in Cognitive Full Duplex Relay Systems", SPAWC12, April 2012 file Presented  2012-06 
4 [Other Conf. Papers] Hyungjong Kim, Sungsoo Park, Seokwon Lee, and Daesik Hong, "Spectrum Sharing in Cognitive Radio Networks: Impacts of Interference Power Constraints", CogART2011, Nov. 2011 (Invited Paper) file Presented  2011-11 
3 [IEEE ICC] Jemin Lee, Jeffrey G. Andrews, and Daesik Hong, "The Effect of Interference Cancellation on Spectrum-Sharing Transmission Capacity", IEEE ICC 2011, June 2011 file Presented  2011-06 
2 [IEEE ICC] Jemin Lee, Sungmook Lim, Jeffrey G. Andrews and Daesik Hong, "Achievable Transmission Capacity of Secondary System in Cognitive Radio Networks", IEEE ICC 2010, Dec. 2009 file Presented  2009-12 
1 [IEEE TENCON] Hano Wang, Dongkyu Kim, Gosan Noh, and Daesik Hong, "Throughput Maximization of SINR-based Spectrum Sharing Policy", IEEE TENCON, Nov. 2009 file Presented  2009-11