Sensitivity of feedback channel delay on transmit adaptive array

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

Research output: Contribution to journalConference article


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. In this paper, we address the algorithm that determines space combing weight vector maximizing received signal power at mobile on frequency flat fading channel and investigate the performance degradation by 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 fadings at transmit antennas are not spatially correlated.

Original languageEnglish
Pages (from-to)556-559
Number of pages4
JournalIEEE Vehicular Technology Conference
Publication statusPublished - 2002 Jan 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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