Optimal Power Allocation of Cognitive Radio with Incomplete Channel State Information

2011 ◽  
Vol E94-B (5) ◽  
pp. 1502-1505 ◽  
Author(s):  
Luxi LU ◽  
Wei JIANG ◽  
Haige XIANG ◽  
Wu LUO
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Channel State Information ◽  
Optimal Power Allocation ◽  
Channel State ◽  
State Information ◽  
Optimal Power

Optimal Power Allocation for CC-HARQ-based Cognitive Radio with Statistical CSI in Nakagami Slow Fading Channels

Frequenz ◽  
2017 ◽  
Vol 71 (1-2) ◽  
pp. 65-72
Author(s):  
Ding Xu ◽  
Qun Li
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Fading Channels ◽  
Recursive Algorithm ◽  
Primary User ◽  
Optimal Power Allocation ◽  
Channel State ◽  
Slow Fading ◽  
Optimal Power ◽  
Slow Fading Channels

Abstract This paper addresses the power allocation problem for cognitive radio (CR) based on hybrid-automatic-repeat-request (HARQ) with chase combining (CC) in Nakagamimslow fading channels. We assume that, instead of the perfect instantaneous channel state information (CSI), only the statistical CSI is available at the secondary user (SU) transmitter. The aim is to minimize the SU outage probability under the primary user (PU) interference outage constraint. Using the Lagrange multiplier method, an iterative and recursive algorithm is derived to obtain the optimal power allocation for each transmission round. Extensive numerical results are presented to illustrate the performance of the proposed algorithm.

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