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

Title
Primary user localisation and uplink resource allocation in orthogonal frequency division multiple access cognitive radio systems
Author
남해운
Keywords
POWER ALLOCATION; NETWORKS; INFORMATION; ALGORITHM
Issue Date
2015-05
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
IET COMMUNICATIONS, v. 9, No. 8, Page. 1131-1137
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.
URI
http://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1002http://hdl.handle.net/20.500.11754/36366
ISSN
1751-8628; 1751-8636
DOI
10.1049/iet-com.2014.1002
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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