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http://dx.doi.org/10.7840/KICS.2012.37.6A.488

New Interference Alignment Technique using Least Square Method in Multi-User MIMO Systems  

Jo, Myung-Ju (인천대학교 전자공학과 통신신호처리연구실)
Byun, Youn-Shik (인천대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.6A, 2012 , pp. 488-496 More about this Journal
Abstract
In this paper, the scheme for designing optimal beamforming matrix for interference control is proposed. The optimal beamforming matrix is found though linear combination of interference alignment conditions and renewal of linear combination coefficient. The proposed scheme has advantages that the complexity is reduced and there is no multiplying operation in matrix calculations even if proposed scheme has the form similar to that of existing least square based scheme. The simulation results show that proposed scheme has about 4bps/Hz higher gain than existing least square scheme. Also there is no additional multiplying calculation and increase of matrix size when the number of transmit and receive antennas is increased.
Keywords
interference alignment; multi user; MIMO; Least Square; complexity;
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