Optimal power allocation for cognitive relay networks: amplify-and-forward versus selection relay |
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| Authors: | YUE WenJing ZHENG BaoYu MENG QingMin YUE WenJie & CUI JingWu Institute of Signal Processing Transmission Nanjing University of Posts Telecommunications Nanjing China |
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| Affiliation: | YUE WenJing 1,2,ZHENG BaoYu 1,MENG QingMin 1,YUE WenJie 3 & CUI JingWu 1 1 Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecommunications,Nanjing 210003,China,2 Department of Electronic Engineering,Shanghai Jiaotong University,Shanghai 200240,3 Shanxi Institute of Educational Science,Taiyuan 030009 |
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| Abstract: | We consider a cognitive relay network which is defined by a source,a destination,and cognitive relay nodes and primary user nodes.In this network,a source is assisted by cognitive relay nodes which allow coexisting with primary user nodes by imposing severe constraints on the transmission power so that they operate below the noise floor of primary user nodes.In this paper,we mainly study the power allocation strategies of this system to minimize the outage probability subject to total and individual power c... |
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| Keywords: | cognitive radio (CR) relay networks power allocation outage probability |
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