Title :
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
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;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2005.851265
