NDLI: Primary user localisation and uplink resource allocation in orthogonal frequency division multiple access cognitive radio systems

Content Provider	IET Digital Library
Author	Nam, Haewoon Saeed, Nasir Ghorbel, Mand Ben Alouini, Mohamed Slim
Abstract	In cognitive radio networks, secondary users (SUs) can share spectrum with primary users (PUs) under the condition that no interference is caused to the PUs. To evaluate the interference imposed to the PUs, the cognitive systems discussed in the literature usually assume that the channel state information (CSI) of the link from a secondary transmitter to a primary receiver (interference link) is known at the secondary transmitter. However, this assumption may often be impractical in cognitive radio systems, since the PUs need to be oblivious to the presence of the SUs. The authors first discuss PU localisation and then introduce an uplink resource allocation algorithm for orthogonal frequency division multiple access-based cognitive radio systems, where relative location information between primary and SUs is used instead of CSI of the interference link to estimate the interference. Numerical and simulation results show that it is indeed effective to use location information as a part of resource allocation and thus a near-optimal capacity is achieved.
Starting Page	1131
Ending Page	1137
Page Count	7
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 8, May (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1002
Journal	IET Communications
Publisher Date	2015-04-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Channel State Information Cognitive Radio CSI Electromagnetic Compatibility Frequency Division Multiple Access Interference Interference Evaluation Interference Link Modulation And Coding Method Multiple Access Communication Near-optimal Capacity OFDM Modulation Orthogonal Frequency Division Multiple Access Cognitive Radio System Primary Receiver Primary User Primary User Localisation PU Localisation Radio Frequency Interference Radio Link And Equipment Radio Spectrum Management Resource Allocation Secondary Transmitter Secondary User Spectrum Sharing SUs Uplink Resource Allocation Algorithm
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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