NDLI: Robust power control for underlay cognitive radio networks under probabilistic quality of service and interference constraints

Content Provider	IET Digital Library
Author	Xu, Yongjun Zhao, Xiaohui
Abstract	In cognitive radio networks, conventional power control algorithms (PCAs) based on instantaneous perfect channel gain may lead to performance degradation in practical systems, since channel uncertainties are inevitable because of quantisation errors and estimation errors. As a result, robustness of the algorithms becomes an important issue. However, traditional robust PCAs with probabilistic models require to perfectly know the distribution information of the estimation error (e.g. Gaussian distribution) which is difficult to obtain. Moreover, the distribution function of the actual error may not be Gaussian distribution. In this study, instead of using deterministic distribution model, a robust PCA based on a distribution-free method is designed to minimise total transmit power of secondary users subject to probabilistic interference and signal to interference plus noise ratio constraints. Based on the minimax probability machine, the original problem is reformulated as a second order cone programming problem solved by interior-point method. An adaptive estimation scheme is proposed to estimate the actual mean and covariance matrix of uncertain parameters. Simulation results demonstrate the effectiveness and robustness of the proposed algorithm by comparing with the robust algorithms under worst-case constraints and probabilistic constraints, respectively.
Starting Page	3333
Ending Page	3340
Page Count	8
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 18, Dec (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0300
Journal	IET Communications
Publisher Date	2014-12-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Estimation Adaptive Estimation Scheme Algebra Cognitive Radio Control Application in Radio And Radar Covariance Matrices Covariance Matrix Deterministic Distribution Model Distribution-free Method Electromagnetic Compatibility Estimation Error Gaussian Channel Gaussian Distribution Instantaneous Perfect Channel Gain Interference Interior-point Method Minimax Probability Machine Minimax Technique Optimisation Technique PCA Power And Energy Control Power Control Probabilistic Interference Constraint Probability Quality of Service Quantisation Error Radio Frequency Interference Radio Link And Equipment Robust Power Control Algorithm Second Order Cone Programming Problem Signal-to-interference-and-noise Ratio Constraint Statistics Telecommunication Control Underlay Cognitive Radio Network Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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