Measurement of Time-Varying MIMO Channel for Performance Analysis of Closed-Loop Transmission

Author

Mizutani, Kei ; Sakaguchi, Kei ; Takada, Jun-ichi ; Araki, Kiyomichi

Author_Institution

Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol.

Volume

6

fYear

2006

fDate

7-10 May 2006

Firstpage

2854

Lastpage

2858

Abstract

A real-time multiple-input multiple-output (MIMO) channel measurement system was implemented by using a 4times4 MIMO software defined radio (SDR) testbed. A target application of this system is to evaluate realistic performance of closed-loop MIMO transmission in time-varying channels at 5 GHz band. The results of indoor measurements showed that feedback delay of the closed-loop transmission causes severe degradation of channel capacity, and an interference canceller in eigenbeamspace is indispensable in achieving the benefits of channel state information (CSI) feedback

Keywords

MIMO systems; channel capacity; eigenvalues and eigenfunctions; interference suppression; software radio; time-varying channels; 5 GHz; SDR testbed; channel capacity; channel state information feedback; closed-loop MIMO transmission; eigenbeamspace; feedback delay; interference canceller; real-time multiple-input multiple-output channel measurement system; software defined radio testbed; time-varying MIMO channel; Application software; MIMO; Performance analysis; Real time systems; Software measurement; Software radio; Software testing; State feedback; System testing; Time-varying channels;

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.2006.1683389

Filename

1683389