MMSE precoder for unitary space-time codes in correlated time-varying channels

Author

Nguyen, Van Khanh ; Xiang, Yong

Author_Institution

Sch. of Eng. & Technol., Deakin Univ., Geelong, Vic., Australia

Volume

12

Issue

8

fYear

2005

Firstpage

569

Lastpage

572

Abstract

This letter addresses the problem of the design of a precoder for multiple transmit antenna communication systems with spatially and temporally correlated fading channels. By using the asymptotic (high signal-to-noise ratio) mean-square error of the channel estimates, the letter derives a precoder for unitary space-time codes that can exploit the spatiotemporal correlation in the time-varying fading channels. Simulation results illustrate that significant performance gains can be achieved by using the new precoder.

Keywords

Kalman filters; Riccati equations; channel estimation; correlation theory; least mean squares methods; space-time codes; spatiotemporal phenomena; time-varying channels; transmitting antennas; Algebraic Riccati equation; MMSE precoder; asymptotic mean-square error; channel estimate; correlated time-varying channel; kaIman filter; multiple transmit antenna communication system; spatially correlated fading channel; spatiotemporal correlation; temporally correlated fading channel; unitary space-time code; Channel estimation; Fading; Receiving antennas; Riccati equations; Signal to noise ratio; Spatiotemporal phenomena; Statistics; Time-varying channels; Transmitters; Transmitting antennas; Algebraic Riccati equation; Kalman filter; mean-square error (MSE); precoder; unitary codes;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2005.851265

Filename

1468174