Adaptive subcarrier allocation for multiuser MIMO OFDM systems in frequency selective fading channel

Author

Xiao, Shuang ; Xiao, Xiao ; Li, Beiping ; Hu, Zhenping

Author_Institution

Dept. of Inf., Jianghan Univ., Wuhan, China

Volume

1

fYear

2005

fDate

23-26 Sept. 2005

Firstpage

61

Lastpage

64

Abstract

In this paper, the impact of multiuser diversity for V-BLAST based OFDM systems in frequency selective fading channel is considered, and a multiuser subcarrier allocation criterion is developed aimed to optimizing the system-level performance. Mathematical analyses and numeric simulations demonstrate that the proposed subcarrier assignment strategy outperforms the static assignment scheme significantly, even with little amount of feedback. In order to guarantee the users´ quality of service (QoS), a reallocation algorithm is given, and it behaves well in our experiments.

Keywords

MIMO systems; OFDM modulation; channel allocation; fading channels; multiuser channels; quality of service; QoS; adaptive subcarrier allocation; frequency selective fading channel; multiuser MIMO OFDM systems; multiuser diversity; quality of service; reallocation algorithm; static assignment scheme; subcarrier assignment strategy; Analytical models; Fading; Feedback; Frequency diversity; MIMO; Mathematical analysis; Numerical simulation; OFDM; Quality of service; Radio spectrum management;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on

Print_ISBN

0-7803-9335-X

Type

conf

DOI

10.1109/WCNM.2005.1543983

Filename

1543983