Exploiting the structure of OSTBC´s to improve the robustness of worst-case optimization based linear multi-user MIMO receivers

Author

Rong, Yue ; ShahbazPanahi, Shahram ; Gershman, Alex B.

Author_Institution

Dept. of Comm. Syst., Duisburg Univ., Germany

Volume

4

fYear

2005

fDate

18-23 March 2005

Abstract

In this paper, we improve the performance of robust linear receivers for multi-user multiple-input multiple-output (MIMO) wireless systems by exploiting the inherent structure of orthogonal space-time block codes (OSTBC). This particular structure results in a worst-case optimization problem with structured uncertainty set. Exploiting this structure, an improved robust linear receiver with a combination of fixed diagonal loading and adaptive non-diagonal loading of the data covariance matrix is obtained.

Keywords

MIMO systems; block codes; covariance matrices; multiuser channels; optimisation; radio receivers; space-time codes; OSTBC; adaptive nondiagonal loading; data covariance matrix; fixed diagonal loading; linear multi-user MIMO receivers; multiple-input multiple-output wireless systems; orthogonal space-time block codes; performance; robustness; structured uncertainty set; worst-case optimization; Block codes; Covariance matrix; Fading; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Noise robustness; Transmitters; Uncertainty; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8874-7

Type

conf

DOI

10.1109/ICASSP.2005.1416125

Filename

1416125