Robust SINR-constrained MISO downlink beamforming: When is semidefinite programming relaxation tight?

Author

Song, Enbin ; Shi, Qingjiang ; Sanjabi, Maziar ; Sun, Ruoyu ; Luo, Zhi-Quan

Author_Institution

Coll. of Math., Sichuan Univ., Chengdu, China

fYear

2011

fDate

22-27 May 2011

Firstpage

3096

Lastpage

3099

Abstract

We consider the robust beamforming problem under imperfect channel state information (CSI) subject to SINR constraints in a downlink multiuser MISO system. One popular approach to solve this nonconvex optimization problem is via semidefinite relaxation (SDR). In this paper, we prove that the SDR method is tight when the channel uncertainty bound is small or when the base station is equipped with two antennas.

Keywords

antennas; array signal processing; concave programming; multi-access systems; radio links; relaxation theory; wireless channels; SDR method; antenna; base station; channel state information; channel uncertainty bound; downlink multiuser MISO system; nonconvex optimization problem; robust SINR-constrained MISO downlink beamforming; robust beamforming problem; semidefinite programming relaxation; Array signal processing; Downlink; Interference; Quality of service; Robustness; Signal to noise ratio; Uncertainty; Robust beamforming; SDR; SINR; channel uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on

Conference_Location

Prague

ISSN

1520-6149

Print_ISBN

978-1-4577-0538-0

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2011.5946350

Filename

5946350