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

2016 ◽  
Vol 10 (15) ◽  
pp. 2010-2017 ◽  
Author(s):  
Ling Zhu ◽  
Xiaohui Zhao
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Spectrum Sensing ◽  
Orthogonal Frequency Division Multiplexing ◽  
Cognitive Radio Network ◽  
Frequency Division Multiplexing ◽  
Radio Network ◽  
Frequency Division ◽  
Robust Power Allocation ◽  
Underlay Cognitive Radio

Joint Subcarrier and Power Allocation for Uplink Spectrum Sharing in Cognitive OFDM Networks: A Waterfilling Based Approach

2013 ◽  
Vol 756-759 ◽  
pp. 1979-1983 ◽  
Author(s):  
Yue Huai Ma ◽  
Bin Zhang ◽  
Wei Zhang ◽  
Meng Xiang Xu
Keyword(s):  
Power Allocation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Spectrum Sharing ◽  
Cognitive Radio Network ◽  
Frequency Division Multiplexing ◽  
Radio Network ◽  
Frequency Division ◽  
Allocation Algorithm ◽  
Primary Network ◽  
Simulation Results

In this paper, the subcarrier and power allocation problem for the orthogonal frequency division multiplexing (OFDM) cognitive radio network which coexists with the primary network is studied. A cognitive waterfilling (CWF) power allocation algorithm which based upon the classical waterfilling mechanism is proposed for the single SU scenario. As for multi-SU case, we present an efficient joint subcarrier and power allocation algorithm called MS-CWF algorithm. Simulation results show the effectiveness of the proposed CWF and MS-CWF algorithms.

Power Allocation for Secondary Users in Relay Assisted Multi-Band Underlay Cognitive Radio Network

2016 ◽  
Vol E99.B (3) ◽  
pp. 714-722
Author(s):  
Wenhao JIANG ◽  
Wenjiang FENG ◽  
Shaoxiang GU ◽  
Yuxiang LIU ◽  
Zhiming WANG
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Network ◽  
Radio Network ◽  
Secondary Users ◽  
Underlay Cognitive Radio ◽  
Multi Band
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