NDLI: Robust resource allocation for orthogonal frequency division multiplexing-based cooperative cognitive radio networks with imperfect channel state information

Content Provider	IET Digital Library
Author	Yang, Weiwei Zhao, Xiaohui
Abstract	In this study, the authors study the robust resource allocation problem for orthogonal frequency division multiplexing-based cooperative cognitive radio networks (CRNs) with decode and forward protocol and consideration of imperfect channel state information. The objective is to maximise the capacity of the cooperative CRN, while the interference to primary user receiver is below a predefined interference threshold and the transmit power of cognitive source and each relay is kept within their power budgets. Considering all possible channel uncertainties, they propose a heuristic robust relay selection scheme and formulate robust power allocation as a semi-infinite programming (SIP). By the worst-case approach, the SIP problem is converted into a convex optimisation problem and solved by the Lagrange dual decomposition method. They also analyse feasible regions of the constraints, convergence behaviour and computational complexity of their proposed robust algorithm. Simulation results show the impact of channel uncertainties and the outperformance of the proposed algorithm by comparing with non-robust algorithms.
Starting Page	273
Ending Page	281
Page Count	9
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 2, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0742
Journal	IET Communications
Publisher Date	2017-01-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cognitive Radio Convex Optimisation Problem Convex Programming Cooperative Communication Cooperative CRN Decode And Forward Communication Decode And Forward Protocol Electromagnetic Compatibility Imperfect Channel State Information Interference Lagrange Dual Decomposition Method Modulation And Coding Method OFDM Modulation Optimisation Technique Orthogonal Frequency Division Multiplexing-based Cooperative Cognitive Radio Network Predefined Interference Threshold Radio Link And Equipment Robust Relay Selection Scheme Robust Resource Allocation Problem Semi-infinite Programming SIP
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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