Optimal beamforming in wireless multiuser MIMO-relay networks

Author

Golbon-Haghighi, Mohammad-Hossein ; Shirazi, Mariko ; Mahboobi, B. ; Ardebilipour, Mehrdad

Author_Institution

Pasargad Higher Educ. Inst., Shiraz, Iran

fYear

2013

fDate

14-16 May 2013

Firstpage

1

Lastpage

5

Abstract

This paper deals with optimal beamforming in wireless multiple-input-multiple-output (MIMO) relay networks that involves multiple concurrent source-destination pairs with imperfect channel state information (CSI) at relays. Our aim is the optimization of the MIMO relay weights that minimize the total relay transmit power subject to signal-to-interference-plus-noise ratio (SINR) of all destinations to be kept above a certain threshold. Since power minimization is a non-convex quadratically constrained quadratic program (QCQP), we use semi-definite programming (SDP) relaxation of above mentioned problem by using a randomization technique.

Keywords

MIMO communication; array signal processing; interference suppression; minimisation; multiuser channels; quadratic programming; relay networks (telecommunication); wireless channels; CSI; MIMO relay weights; SDP relaxation; SINR; channel state information; multiple concurrent source-destination; multiple-input-multiple-output network; nonconvex QCQP; optimal beamforming; power minimization; quadratically constrained quadratic program; randomization technique; relay transmit power; semidefinite programming; signal-to-interference-plus-noise ratio; wireless multiuser MIMO relay network; Array signal processing; Interference; MIMO; Optimization; Relays; Signal to noise ratio; Vectors; MIMO; MIMO-relay; Semi-definite programming; beamforming; power allocation; relay networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2013 21st Iranian Conference on

Conference_Location

Mashhad

Type

conf

DOI

10.1109/IranianCEE.2013.6599747

Filename

6599747