Sensitivity of feedback channel delay on transmit adaptive array

Author

Ahn, Cheol Yong ; Han, Jin Kyu ; Choi, Young-Kwan ; Kim, Dong Ku

Author_Institution

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

Volume

2

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

556

Abstract

The investigation into the effect of various feedback errors on system performance can help the robust feedback channel design and transmission of exact feedback channel information as well. We address the algorithm that determines space combining weight vector maximizing received signal power at the mobile on a frequency flat fading channel and investigate the performance degradation by the feedback channel delay in the FDD/CDMA systems employing transmit beamforming. We observe the effect of feedback channel delay corresponding to the number of transmit antennas and the temporal/spatial correlation of channel. The results show that performance is more sensitive to feedback delay with the larger number of antennas when fading at the transmit antennas are not spatially correlated.

Keywords

adaptive antenna arrays; array signal processing; code division multiple access; delays; error statistics; fading channels; feedback; multiuser channels; transmitting antennas; BER performance; FDD/CDMA systems; feedback channel delay; feedback channel delay sensitivity; feedback channel information transmission; feedback error; frequency flat fading channel; received signal power; robust feedback channel design; space combining weight vector; system performance; temporal/spatial correlation; transmit adaptive array; transmit antennas; transmit beamforming; Adaptive arrays; Antenna feeds; Degradation; Delay; Fading; Feedback; Frequency; Robustness; System performance; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th

Print_ISBN

0-7803-7484-3

Type

conf

DOI

10.1109/VTC.2002.1002543

Filename

1002543