Robust power allocation for orthogonal frequency division multiplexing-based overlay/underlay cognitive radio network under spectrum sensing errors and channel uncertainties

In this study, a robust power allocation scheme with orthogonal frequency division multiplexing-based cognitive radio network is proposed to maximise total data transmission rate subject to interference power constraint of primary user (PU) and transmit power budget constraint of secondary user wher...

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Published inIET communications Vol. 10; no. 15; pp. 2010 - 2017
Main Authors Zhu, Ling, Zhao, Xiaohui
Format Journal Article
LanguageEnglish
Published The Institution of Engineering and Technology 13.10.2016
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Abstract In this study, a robust power allocation scheme with orthogonal frequency division multiplexing-based cognitive radio network is proposed to maximise total data transmission rate subject to interference power constraint of primary user (PU) and transmit power budget constraint of secondary user where channel uncertainties and spectrum sensing errors are simultaneously considered. The authors first formulate the interference model by taking the imperfect spectrum sensing into account, then the channel state information errors are considered and assumed to be bounded with ellipsoidal and interval sets to establish robust resource allocation problem. On the basis of the worst-case approach and Lagrange dual decomposition method, the original optimisation problem is converted into a convex one and solved. Simulation results show the robustness of their proposed scheme and the trade-off performance with a sub-optimal data transmission rate, but better protection of PU.
AbstractList In this study, a robust power allocation scheme with orthogonal frequency division multiplexing‐based cognitive radio network is proposed to maximise total data transmission rate subject to interference power constraint of primary user (PU) and transmit power budget constraint of secondary user where channel uncertainties and spectrum sensing errors are simultaneously considered. The authors first formulate the interference model by taking the imperfect spectrum sensing into account, then the channel state information errors are considered and assumed to be bounded with ellipsoidal and interval sets to establish robust resource allocation problem. On the basis of the worst‐case approach and Lagrange dual decomposition method, the original optimisation problem is converted into a convex one and solved. Simulation results show the robustness of their proposed scheme and the trade‐off performance with a sub‐optimal data transmission rate, but better protection of PU.
Author Zhao, Xiaohui
Zhu, Ling
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  organization: College of Communication Engineering, Jilin University, Changchun 130012, People's Republic of China
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Issue 15
Keywords spectrum sensing errors
radio spectrum management
channel state information errors
telecommunication power management
channel uncertainties
power allocation
secondary user
cognitive radio
primary user
orthogonal frequency division multiplexing-based overlay/underlay cognitive radio network
interference model
Lagrange dual decomposition
OFDM modulation
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– volume-title: Semi‐infinite programming
  year: 1998
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– ident: e_1_2_8_9_1
  doi: 10.1109/TWC.2008.4472014
– ident: e_1_2_8_11_1
  doi: 10.1109/TWC.2013.062413.121892
– ident: e_1_2_8_24_1
  doi: 10.1057/palgrave.jors.2600425
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Snippet In this study, a robust power allocation scheme with orthogonal frequency division multiplexing-based cognitive radio network is proposed to maximise total...
In this study, a robust power allocation scheme with orthogonal frequency division multiplexing‐based cognitive radio network is proposed to maximise total...
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wiley
iet
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StartPage 2010
SubjectTerms Allocations
channel state information errors
channel uncertainties
Channels
cognitive radio
Data transmission
Detection
Error detection
interference model
Lagrange dual decomposition
Multiplexing
Networks
OFDM modulation
orthogonal frequency division multiplexing‐based overlay/underlay cognitive radio network
power allocation
primary user
radio spectrum management
Regular Papers
secondary user
spectrum sensing errors
telecommunication power management
Uncertainty
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Title Robust power allocation for orthogonal frequency division multiplexing-based overlay/underlay cognitive radio network under spectrum sensing errors and channel uncertainties
URI http://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0384
https://onlinelibrary.wiley.com/doi/abs/10.1049%2Fiet-com.2016.0384
https://www.proquest.com/docview/1864540163
Volume 10
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