Title :
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
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;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on
Print_ISBN :
0-7803-7858-X
DOI :
10.1109/SPAWC.2003.1319019
