Outage Probability and Outage-Based Robust Beamforming for MIMO Interference Channels with Imperfect Channel State Information

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In this paper, the outage probability and outage-based beam design for multiple-input multiple-output (MIMO) interference channels are considered. First, closed-form expressions for the outage probability in MIMO interference channels are derived under the assumption of Gaussian-distributed channel state information (CSI) error, and the asymptotic behavior of the outage probability as a function of several system parameters is examined by using the Chernoff bound. It is shown that the outage probability decreases exponentially with respect to the quality of CSI measured by the inverse of the mean square error of CSI. Second, based on the derived outage probability expressions, an iterative beam design algorithm for maximizing the sum outage rate is proposed. Numerical results show that the proposed beam design algorithm yields significantly better sum outage rate performance than conventional algorithms such as interference alignment developed under the assumption of perfect CSI.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-10
Language
English
Article Type
Article
Keywords

INDEFINITE QUADRATIC-FORMS; NORMAL VARIABLES; SERIES REPRESENTATIONS; ALIGNMENT; DISTRIBUTIONS; NETWORKS; DESIGNS

Citation

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.11, no.10, pp.3561 - 3573

ISSN
1536-1276
DOI
10.1109/TWC.2012.072512.111899
URI
http://hdl.handle.net/10203/103046
Appears in Collection
EE-Journal Papers(저널논문)
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