An proportional fair resource allocation in OFDM-based cognitive radio networks under imperfect Channel-State information

Author

Jian Li ; Chen He ; Lingge Jiang

Author_Institution

Sch. of Electron. Infomation, Shanghai Dianji Univ., Shanghai, China

fYear

2013

fDate

7-10 April 2013

Firstpage

1814

Lastpage

1818

Abstract

In this paper, we investigate the subchannel assignment and power allocation algorithm for downlink OFDM-based cognitive network where the Channel-State Information(CSI) between the secondary system and the primary system is imperfect. We formulate an optimization problem under both the interference-power outage constraint and maximum transmit-power constraint to maximize the spectrum utility and provide proportional fairness to the SUs. Lagrangian duality method is used to solve the problem. Simulation results show that the proposed algorithm achieve good performance in terms of fairness and spectrum efficiency.

Keywords

OFDM modulation; cognitive radio; radio links; radio networks; radio spectrum management; radiofrequency interference; resource allocation; wireless channels; CSI; Lagrangian duality method; OFDM-based cognitive radio network; SU; imperfect channel state information; interference-power outage constraint; maximum transmit-power constraint; power allocation algorithm; primary system; proportional fair resource allocation; secondary system; spectrum utility; subchannel assignment; Interference;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2013 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-5938-2

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2013.6554839

Filename

6554839