DocumentCode :
2510590
Title :
Optimal multiuser downlink cooperative beamforming in cognitive radio networks with SINR and power constraints
Author :
Velmurugan, P.G.S. ; Suban, A. ; Thiruvengadam, S.J.
Author_Institution :
ECE Dept., Thiagarajar Coll. of Eng., Madurai, India
fYear :
2015
fDate :
19-21 Feb. 2015
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, optimal multiuser downlink cooperative beamforming in spectrum underlay based cognitive radio network is considered with target SINR and sum power constraints. In existing works, transmit beamforming vectors for maximum number of admitted secondary users are designed with fixed target SINR and sum power constraints. However, this joint optimization problem becomes infeasible as some users may absorb more power to meet the target SINR. Hence, the objective of this paper is to design optimal multiuser downlink beamforming vectors for primary and secondary base stations in a cooperative manner satisfying the practical bounded SINR. This objective is formulated as convex optimization problem and it is solved using second order cone programming method. The performance of the cognitive radio network is analyzed with the practical constraints.
Keywords :
array signal processing; cognitive radio; convex programming; cooperative communication; multiuser detection; radio networks; SINR; cognitive radio networks; convex optimization problem; optimal multiuser downlink cooperative beamforming; primary base stations; second order cone programming method; secondary base stations; secondary users; sum power constraints; Array signal processing; Cognitive radio; Interference; Joints; Optimization; Receivers; Signal to noise ratio; Beamforming; bounded constraint; cognitive radio; convex optimization; sum power constraint;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015 IEEE International Conference on
Conference_Location :
Kozhikode
Type :
conf
DOI :
10.1109/SPICES.2015.7091487
Filename :
7091487
Link To Document :
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