Linear precoding for space-time coded systems with known fading correlations

Author

Sampath, Hemanth ; Paulraj, Arogyaswami

Author_Institution

Iospan Wireless Inc., San Jose, CA, USA

Volume

6

Issue

6

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

239

Lastpage

241

Abstract

We design an optimal linear precoder for a space-time coded system assuming knowledge of only the transmit antenna fading correlations. Assuming a flat fading channel and a maximum-likelihood receiver, we show that the linear precoder transmits power on the eigenmodes of the transmit antenna correlation matrix. The power allocation on the eigenmodes is a form of waterpouring policy. Simulation results are presented to show performance improvement on a space-time coded system.

Keywords

MIMO systems; correlation methods; eigenvalues and eigenfunctions; fading channels; linear codes; matrix algebra; optimisation; transmitting antennas; MIMO fading channels; eigenmodes; fading correlations; flat fading channel; maximum-likelihood receiver; optimal linear precoder; power allocation; simulation results; space-time coded system; space-time coded systems; transmit antenna correlation matrix; transmit antenna fading correlations; waterpouring policy; Channel capacity; Downlink; Fading; MIMO; Performance gain; Receiving antennas; Scattering; System performance; Transmitters; Transmitting antennas;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2002.1010867

Filename

1010867