Title :
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.
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;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683389
