Trace balancing for multiuser MIMO downlink transmission

Author

Boche, Holger ; Schubert, Martin ; Jorswieck, Eduard A.

Author_Institution

Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany

Volume

2

fYear

2002

fDate

3-6 Nov. 2002

Firstpage

1379

Abstract

We consider the problem of balancing individual capacities in a multiuser MIMO downlink channel. If perfect channel state information is available at the base station, the rates of all users can be jointly controlled by adjusting the transmit covariance matrices. We propose a new transmission strategy based on trace balancing, which is optimal in the low SNR regime. Otherwise, it provides an approximation. An iterative algorithm is proposed, which rapidly converges to the global optimum of the trace balancing problem.

Keywords

MIMO systems; covariance matrices; iterative methods; mobile radio; multiuser channels; SNR; approximation; capacity balancing; channel state information; iterative algorithm; multiuser MIMO downlink transmission; multiuser downlink channel; noncooperating mobile terminals; trace balancing; transmit covariance matrices; wireless communication systems; Covariance matrix; Crosstalk; Downlink; Frequency; Interference; Iterative algorithms; MIMO; Receiving antennas; Transmitters; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7576-9

Type

conf

DOI

10.1109/ACSSC.2002.1197005

Filename

1197005