A subspace multiuser beamforming algorithm for downlink in mobile communication systems

Author

Wang, N.Y. ; Agathoklis, P. ; Antoniou, A.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

3

fYear

2004

fDate

23-26 May 2004

Abstract

A new technique for downlink multiuser beamforming in mobile communications is described. The optimization problem is reformulated by modifying the constraints so that weight vectors of different mobile stations are optimized in a reduced feasible region that is a subset of the one of the multiuser beamforming problem. Simulation results show that the modified optimization problem leads to solutions that satisfy the signal-to-noise-plus-interference ratio specification at each mobile station and the total power transmitted from the base station is very close to the optimal one. The solution of the modified optimization problem requires significantly less computation than the optimal multiuser beamforming algorithms.

Keywords

array signal processing; interference (signal); mobile communication; multi-access systems; optimisation; base station; beamforming algorithm; constraint modification; downlink multiuser beamforming; mobile communication system; mobile stations; multiuser beamforming problem; optimal multiuser beamforming; optimization problem reformulation; reduced feasible region; signal-to-noise-plus-interference ratio; subspace multiuser beamforming; transmitted power; weight vectors optimization; Array signal processing; Base stations; Computational complexity; Computational modeling; Constraint optimization; Downlink; Interference; Mobile communication; Power control; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328763

Filename

1328763