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Optimal Transmit Schemes for CR MIMO Systems Under The Average Interference Power Constraints
Zhao Lu 1 #,Lin Gan 2 *,Xie Gang 3
1.School of Electronic Engineering, Beijing University Of Posts And Telecommunications, Beijing 100876
2.School of Electronic Engineering, Beijing University Of Posts And Telecommunications
3.School of Information and Communication Engineering, Beijing University Of Posts And Telecommunications
*Correspondence author
#Submitted by
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Funding: none
Opened online:20 December 2012
Accepted by: none
Citation: Zhao Lu,Lin Gan,Xie Gang.Optimal Transmit Schemes for CR MIMO Systems Under The Average Interference Power Constraints[OL]. [20 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4500464
 
 
Considering the statistical properties of Rayleigh fading channels, this paper tries to gain the average interference power (AIP) constraint for Primary User (PU) in CR MIMO system and studies the optimal transmit strategy for a Cognitive Radio(CR)link to maximize the ergodic capacity subject to the AIP constraint and CR transmit power constraint. Then we compare it with the counterpart subject to the peak interference power (PIP) constraint for PU and the same CR transmit power constraint. Simulation results show that the former can not only reduce the algorithm complexity but also improve the CR ergodic capacity.
Keywords:Cognitive Radio networks; Spectrum Sharing; MIMO; Rayleigh fading channel; tradeoff
 
 
 

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