DMT analysis and optimization for cooperative multiuser OFDMA systems

Author

Yang, Weiwei ; Cai, Yueming ; Wang, Yan ; Zheng, Baoyu

Author_Institution

Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China

fYear

2011

fDate

11-14 Sept. 2011

Firstpage

1585

Lastpage

1589

Abstract

In this paper, we adopt the DMT framework to study a cooperative downlink OFDMA system with multiple relays. We derive the closed-form expression of the DMT curve for the cooperative OFDMA system employing linear constellation precoding at the base station, and linear detection at the mobile users, and develop the optimal symbol loading, relay selection and subcarrier allocation strategy. Simulation results are presented to verify the theoretical analysis and show that our proposed resource allocation strategy can improve the system performance significantly.

Keywords

OFDM modulation; cooperative communication; frequency division multiple access; multiuser channels; optimisation; radio links; resource allocation; subcarrier multiplexing; DMT analysis; cooperative downlink OFDMA system; cooperative multiuser OFDMA system; linear constellation preceding; linear detection; mobile user; multiple relay selection; optimal symbol loading; subcarrier allocation strategy; Base stations; Loading; Mobile communication; OFDM; Relays; Resource management; cooperative diversity; diversity-multiplexing tradeoff (DMT); orthogonal frequency division multiplexing access (OFDMA);

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on

Conference_Location

Toronto, ON

ISSN

pending

Print_ISBN

978-1-4577-1346-0

Electronic_ISBN

pending

Type

conf

DOI

10.1109/PIMRC.2011.6139771

Filename

6139771