A Novel Power Allocation Strategy for Finite Alphabet in MIMO Systems

Author

Huang, Jinliang ; Signell, Svante

Author_Institution

Sch. of Inf. & Commun. Technol., R. Inst. of Technol., Stockholm

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1835

Lastpage

1839

Abstract

One of the significant benefits of multiple-input-multiple-output (MIMO) for wireless applications is the high spectral efficiency it can achieve. Water filling (WF) has long been deemed as the optimal power allocation strategy to maximize the spectral efficiency. However, the high complexity of this algorithm is annoying in the case of finite alphabet. The current paper suggests a novel power allocation strategy in the context of finite alphabet that is much simpler than WF. It can achieve 95% of the spectral efficiency of WF in the i.i.d. Rayleigh fading channel, and even outperform WF in highly correlated fading channel, e.g. the line-of-sight (LOS) Ricean fading channel

Keywords

MIMO systems; Rayleigh channels; Rician channels; MIMO systems; Rayleigh fading channel; Ricean fading channel; multiple-input-multiple-output; optimal power allocation; power allocation strategy; spectral efficiency; water filling; wireless applications; Bit rate; Communications technology; Fading; Filling; MIMO; Power system modeling; Receiving antennas; Singular value decomposition; Space technology; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683164

Filename

1683164