Multimode Random Beamforming for Multiuser Downlink MIMO System with Limited Feedback

Author

Chae, Hyukjin ; Kim, Yohan ; Yang, Janghoon ; Ihm, Bin-chul ; Kim, Dong Ku

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul

fYear

2008

fDate

11-14 May 2008

Firstpage

837

Lastpage

841

Abstract

Multimode transmission has been studied to improve BER and outage capacity in the point-to-point system. In this paper, we consider the multimode transmission for downlink MIMO based on random beamforming(RBF) with limited feedback. We propose four heuristic mode selection and feedback policies to improve the sum rate and outage performance of downlink RBF system based on two approaches: distributed and centralized. Simulation results show that the centralized mode selection scheme with reasonable feedback amount provides waterfilling effect as well as the multiuser diversity gain, leading to the performance improvement of RBF in terms of sum rate and outage probability.

Keywords

MIMO communication; array signal processing; diversity reception; error statistics; feedback; radio links; BER; feedback policy; multimode random beamforming; multimode transmission; multiuser diversity gain; multiuser downlink MIMO system; waterfilling effect; Array signal processing; Bit error rate; Capacity planning; Diversity methods; Downlink; Feedback; MIMO; Research and development; Scheduling; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE

Conference_Location

Singapore

ISSN

1550-2252

Print_ISBN

978-1-4244-1644-8

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2008.182

Filename

4525738