Title :
Enhanced Decision-Directed Channel Estimation of Time-Varying Flat MIMO Channels
Author :
Eitel, Emna ; Speidel, Joachim
Author_Institution :
Univ. of Stuttgart, Stuttgart
Abstract :
This paper presents a combined pilot-assisted and decision-directed approach to estimate a Rayleigh flat fading MIMO channel. The suggested algorithm is very attractive in comparison to other tracking techniques due to its simplicity and numerical robustness. We introduce a moving-average filter to suppress the noise and show that optimizing the filter parameters such as length and initialization coefficients leads to significant performance improvement. Simulation results for different Doppler frequencies show the effectiveness of the proposed scheme.
Keywords :
MIMO communication; Rayleigh channels; channel estimation; filtering theory; time-varying systems; Doppler frequencies; Rayleigh channel; decision-directed channel estimation; moving-average filter; time-varying flat MIMO channels; AWGN; Additive noise; Channel estimation; Filtering; Filters; Frequency; MIMO; Phase estimation; Rayleigh channels; Signal to noise ratio;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394247
