Subcarrier allocation and relay selection for uplink transmission in OFDMA-based cognitive radio systems

Author

Do-Haeng Lee ; Won Hyoung Lee ; Eol Choi ; Ho Young Hwang

Author_Institution

Dept. of Comput. Eng., Kwangwoon Univ., Seoul, South Korea

fYear

2013

fDate

14-16 Oct. 2013

Firstpage

485

Lastpage

487

Abstract

In this paper, we study subcarrier allocation and relay selection for uplink transmission in OFDMA-based cognitive radio (CR) systems. We formulate optimization problems to maximize total uplink throughput of secondary users (SUs) in OFDMA-based CR systems. Then, we propose link quality-based (LQB) scheme and minimum interference-based (MIB) scheme, and simulate the proposed schemes with two given environments. The simulation results show that the performance of MIB scheme is better than that of LQB scheme when the constraint for received interference power from SUs at primary receiver is dominant.

Keywords

OFDM modulation; cognitive radio; frequency division multiple access; optimisation; radio receivers; radiofrequency interference; resource allocation; LQB scheme; MIB scheme; OFDMA; cognitive radio systems; link quality-based scheme; minimum interference-based scheme; optimization problems; primary receiver; received interference power; relay selection; secondary users; subcarrier allocation; uplink transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

ICT Convergence (ICTC), 2013 International Conference on

Conference_Location

Jeju

Type

conf

DOI

10.1109/ICTC.2013.6675402

Filename

6675402