NDLI: Optimal resource allocation for cooperative orthogonal frequency division multiplexing-based cognitive radio networks with imperfect spectrum sensing

Content Provider	IET Digital Library
Author	Hao, Wanming Yang, Showyi Ning, Bing Hao, Wanliang
Abstract	This study investigates sensing-based spectrum sharing access (SSSA) and sensing-based spectrum opportunistic access (SSOA) schemes in cooperative orthogonal frequency division multiplexing (OFDM)-based cognitive radio networks with imperfect spectrum sensing. The optimal resource allocation strategy, including sensing time and transmit power, is designed to maximise the ergodic throughput of the secondary system. For a two-hop cooperative communication in the secondary system, the authors adopt the amplify-and-forward relay protocol and enable the source and relay to sense the state of the primary user jointly. To protect the PU effectively from harmful interference, they consider the average interference power constraint in each hop. The total average transmit power constraint of the source and relay is considered. Two simplified versions for the SSSA and SSOA schemes are employed because of the complexity of the problem. They then propose two algorithms that acquire the optimal sensing time and power allocation for both schemes. Finally, simulation results are presented to compare the performance of the two schemes.
Starting Page	548
Ending Page	557
Page Count	10
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 4, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0605
Journal	IET Communications
Publisher Date	2015-01-07
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Amplify-and-forward Relay Protocol Average Interference Power Constraint Cognitive Radio Cooperative Communication Cooperative Orthogonal Frequency Division Multiplexing-based Cognitive Radio Network Electromagnetic Compatibility Ergodic Throughput Harmful Interference Imperfect Spectrum Sensing Interference Modulation And Coding Method OFDM OFDM Modulation Optimal Resource Allocation Strategy Protocol Radio Frequency Interference Radio Link And Equipment Radio Spectrum Management Relay Network Resource Allocation Secondary System Sensing-based Spectrum Opportunistic Access Scheme Sensing-based Spectrum Sharing Access Signal Detection SSOA Scheme SSSA Telecommunication Two-hop Cooperative Communication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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