Simplified Power Allocation Scheme for Cognitive Multi-Node Relay Networks

Author

Choi, Moonchang ; Park, Junggyun ; Choi, Sooyong

Author_Institution

Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

11

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

2008

Lastpage

2012

Abstract

The simplified optimization problem is considered since the power allocation (PA) problem is the nonconvex optimization problem in cognitive multi-node relay networks, which has the interference on the primary user and the maximum transmission power constraint. The maximum transmission power constraint is guaranteed after we obtained the closed-form solution of the simplified optimization problem which has only the interference constraint on the primary user. The proposed PA method with much lower complexity performs close to the suboptimal PA method using interior point method.

Keywords

cognitive radio; concave programming; radiofrequency interference; cognitive multinode relay networks; interference constraint; interior point method; maximum transmission power constraint; nonconvex optimization problem; primary user; simplified optimization problem; simplified power allocation scheme; suboptimal PA method; Cognitive radio; Interference constraints; Optimization; Relays; Resource management; Throughput; Cognitive multi-node relay networks; interior point method; power allocation; system throughput;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2012.050112.111621

Filename

6196270