Training Signal Design for Estimation of Correlated MIMO Channels With Colored Interference

Author

Liu, Yong ; Wong, Tan F. ; Hager, William W.

Author_Institution

Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL

Volume

55

Issue

4

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

1486

Lastpage

1497

Abstract

In this paper, we study the problem of estimating correlated multiple-input multiple-output (MIMO) channels in the presence of colored interference. The linear minimum mean square error (MMSE) channel estimator is derived and the optimal training sequences are designed based on the MSE of channel estimation. We propose an algorithm to estimate the long-term channel statistics needed for the construction of the optimal training sequences. We also design an efficient scheme to feed back the required information to the transmitter where we can approximately construct the optimal sequences. Numerical results show that the optimal training sequences provide substantial performance gain for channel estimation when compared with other training sequences

Keywords

MIMO communication; channel estimation; correlation methods; least mean squares methods; radiofrequency interference; statistics; wireless channels; MMSE; channel estimator; colored interference; correlated MIMO channels; linear minimum mean square error; long-term channel statistics; multiple-input multiple-output channels; optimal training sequences; training signal design; transmitter; Channel estimation; Fading; Feeds; Interference; MIMO; Mean square error methods; Signal design; Statistics; Transmitters; Wireless communication; Channel estimation; mean square error (MMSE); multiple-input multiple-output (MIMO) system; optimal training sequence;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2006.889976

Filename

4133041