Least Squares Approach to Joint Beam Design for Interference Alignment in Multiuser Multi-Input Multi-Output Interference Channels

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In this correspondence, the problem of interference alignment for K-user time-invariant multi-input multi-output interference channels is considered. The necessary and sufficient conditions for interference alignment are converted to a system of linear equations that have dummy variables. Based on this linear system, a new algorithm for beam design for interference alignment is proposed by minimizing the overall interference misalignment. The proposed algorithm consists of solving a least squares problem iteratively. The convergence of the proposed algorithm is established, and its complexity is analyzed. The performance of the proposed algorithm is also evaluated numerically. It is shown that the proposed algorithm has faster convergence and lower complexity than the previous method with a comparable sum rate performance in the most practical case of two receive antennas.
Publisher
IEEE
Issue Date
2010-09
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON SIGNAL PROCESSING, v.58, pp.4960 - 4966

ISSN
1053-587X
DOI
10.1109/TSP.2010.2051155
URI
http://hdl.handle.net/10203/97114
Appears in Collection
EE-Journal Papers(저널논문)
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