The Spectral Efficiency of 2 × 2 Adaptive MIMO Systems in Spatially Correlated Rayleigh Fading Channel

Author

Huang, Jinliang ; Signell, Svante

Author_Institution

R. Inst. of Technol. (KTH), Stockholm

Volume

2

fYear

2007

fDate

6-8 Dec. 2007

Firstpage

244

Lastpage

247

Abstract

In need for high-speed data transmission over wireless channels, multiple-input multiple-output (MIMO) technology has been suggested as it exhibits significant improvement in channel capacity. In practice, adaptive modulation scheme can be applied in different MIMO algorithms to further improve the system efficiency. In this paper, we derive closed-form expressions for the spectral efficiency of MIMO system utilizing two algorithms: Orthogonal Space-Time Block Coding (OSTBC) and spatial multiplexing with zero-forcing (ZF) receiver. Furthermore, a low-complexity adaptive scheme that switches between OSTBC and ZF to achieve even a higher spectral efficiency is suggested based on the closed form expressions.

Keywords

MIMO communication; Rayleigh channels; adaptive modulation; block codes; channel capacity; space-time codes; wireless channels; MIMO algorithms; adaptive MIMO systems; adaptive modulation scheme; channel capacity; high-speed data transmission; multiple-input multiple-output technology; orthogonal space-time block coding; spatial multiplexing; spatially correlated Rayleigh fading channel; spectral efficiency; wireless channels; zero-forcing receiver; Adaptive systems; Block codes; Channel capacity; Closed-form solution; Data communication; Fading; MIMO; OFDM; Space technology; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Future Generation Communication and Networking (FGCN 2007)

Conference_Location

Jeju

Print_ISBN

0-7695-3048-6

Type

conf

DOI

10.1109/FGCN.2007.218

Filename

4426242