Title :
Optimal training for MIMO time-selective fading channels
Author :
Zhu, Jiangzhang ; Wen, Shuangchun ; Wen, Hong
Author_Institution :
Sch. of Comput. & Commun., Hunan Univ., Changsha, China
Abstract :
Carrier frequency offsets and mobility induced Doppler shifts introduce time-selective in wireless links. To mitigate the resulting time-selective, in this paper, optimal training sequence was designed for linear minimum mean square error (LMMSE) estimation of multi-input multi-output time-selective channels by maximizing a lower bound on the average capacity while at the same time minimizing the mean-square channel estimation error. Optimal number and placement of pilot symbols are also analyzed. Numerical analysis and simulation corroborate our theoretical designs.
Keywords :
MIMO systems; channel estimation; fading channels; least mean squares methods; mobile radio; radio links; wireless channels; Doppler shifts; LMMSE; MIMO time-selective fading channels; linear minimum mean square error; mean-square channel estimation error; multiinput multioutput channels; optimal training sequence; wireless links; Analytical models; Channel estimation; Doppler shift; Estimation error; Fading; Frequency; MIMO; Mean square error methods; Numerical analysis; Numerical simulation;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9335-X
DOI :
10.1109/WCNM.2005.1544003
