Convexity Analysis of the Feasible MSE Region of Sum-Power Constrained Multiuser MIMO Systems

Author

Shi, Shuying ; Schubert, Martin

Author_Institution

Mobile Commun. MCI, Fraunhofer German-Sino Lab., Berlin

Volume

1

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

112

Lastpage

116

Abstract

We study the geometry of the feasible MSE region of multiuser MIMO systems with fixed transmitters and receivers. The sum of all powers is assumed to be constrained. We consider both linear processing and non-linear processing, i.e., interference precompensation in the downlink and successive interference cancellation in the uplink. We show that, for both cases, the feasible MSE region of uplink and downlink is a convex set. In addition, we show for adaptive multiuser reception/preceding, that the maximal feasible MSE region for two-user beamforming systems with adaptive MMSE filtering are convex

Keywords

MIMO systems; adaptive filters; array signal processing; filtering theory; least mean squares methods; multiuser channels; radio links; adaptive MMSE filtering; adaptive multiuser reception; beamforming systems; convexity analysis; downlink; multiuser MIMO systems; nonlinear processing; receivers; sum-power constrained systems; transmitters; uplink; Adaptive filters; Adaptive systems; Array signal processing; Downlink; Filtering; Geometry; Interference cancellation; Interference constraints; MIMO; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on

Conference_Location

Berlin

Print_ISBN

9.7838007291e+012

Type

conf

DOI

10.1109/PIMRC.2005.1651409

Filename

1651409