Title :
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
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;
Conference_Titel :
Electrical Engineering (ICEE), 2013 21st Iranian Conference on
Conference_Location :
Mashhad
DOI :
10.1109/IranianCEE.2013.6599747
