Effect of channel estimation errors and feedback delay on the performance of closed-loop transmit diversity system

Author

Kim, Nam-Soo ; Lee, Ye Hoon

Author_Institution

Dept. of Comput. & Commun. Eng., Chongju Univ., South Korea

fYear

2003

fDate

15-18 June 2003

Firstpage

542

Lastpage

545

Abstract

We analyze the performance of closed-loop transmit diversity systems in the presence of feedback delay and channel estimation error in Rayleigh time-selective flat fading. We formulate both the feedback delay and the channel estimation error as a function of Doppler spread, and derive the average bit error probability under such imperfect channel information. It is shown that the channel estimation error is more sensitive to system performance than feedback delay in slow fading environments.

Keywords

Doppler broadening; Rayleigh channels; channel estimation; delays; diversity reception; error statistics; feedback; maximum likelihood estimation; mobile radio; BER; Doppler spread; ML estimation; Rayleigh fading; Rayleigh time-selective flat fading; average bit error probability; channel estimation errors; channel state information; closed-loop transmit diversity system; feedback delay; mobile station; time-selective fading; Bit error rate; Channel estimation; Computer errors; Delay effects; Delay estimation; Estimation error; Fading; Feedback; Frequency estimation; Performance analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on

Print_ISBN

0-7803-7858-X

Type

conf

DOI

10.1109/SPAWC.2003.1319019

Filename

1319019