DocumentCode :
1983689
Title :
Coordinated relay beamforming based on the worst-case SINR in multicell wireless systems
Author :
Da Wang ; Lin Bai ; Chen Chen ; Ye Jin ; Jinho Choi
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Peking Univ., Beijing, China
fYear :
2012
fDate :
3-7 Dec. 2012
Firstpage :
3941
Lastpage :
3945
Abstract :
This paper studies the coordinated multicell downlink transmission to cope with the severe inter-cell interference (ICI) in future cellular systems. We propose an iterative scheme to jointly optimize the base station (BS) and relay beamforming weights to maximize the worst-case signal-to-interference-and-noise ratio (SINR) with perfect channel state information (CSI), under two different types of BS and relay power constraints, respectively, which are the total power constraints and individual power constraints. Using the semidefinite relaxation (SDR) technology, the optimization problems for BS and relay beamforming weights can be converted into semidefinite programming (SDP) problems, which can be effectively solved by interior-point methods. Simulation results demonstrate that the proposed iterative scheme can achieve near-optimal performance within a few iterations and provide a good tradeoff between performance and cost (i.e. the number of BS antennas and relays) in the multicell systems.
Keywords :
array signal processing; cellular radio; interference (signal); iterative methods; mobile antennas; optimisation; telecommunication channels; BS antennas; SDR technology; base station; cellular systems; coordinated multicell downlink transmission; coordinated relay beamforming; intercell interference; interiorpoint methods; iterative scheme; multicell systems; multicell wireless systems; near-optimal performance; optimization problems; perfect channel state information; relay beamforming weights; relay power constraints; relays; semidefinite programming problems; semidefinite relaxation; worst-case SINR; worst-case signal-to-interference-andnoise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Communications Conference (GLOBECOM), 2012 IEEE
Conference_Location :
Anaheim, CA
ISSN :
1930-529X
Print_ISBN :
978-1-4673-0920-2
Electronic_ISBN :
1930-529X
Type :
conf
DOI :
10.1109/GLOCOM.2012.6503732
Filename :
6503732
Link To Document :
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