TY - JOUR
T1 - Outage probability and outage-based robust beamforming for MIMO interference channels with imperfect channel state information
AU - Park, Juho
AU - Sung, Youngchul
AU - Kim, Donggun
AU - Vincent Poor, H.
N1 - Funding Information:
Manuscript received October 23, 2011; revised April 24, 2012; accepted June 22, 2012. The associate editor coordinating the review of this paper and approving it for publication was M. McKay. J. Park, Y. Sung (corresponding author) and D. Kim are with the Dept. of Electrical Engineering, KAIST, Daejeon 305-701, South Korea (e-mail: {jhp@, ysung@ee, dg.kim@}kaist.ac.kr). H. V. Poor is with the Dept. of Electrical Engineering, Princeton University, Princeton, NJ 08544 (e-mail: [email protected]). This work was supported by the Korea Research Foundation Grant funded by the Korean Government (KRF-2008-220-D00079). A preliminary version of this work was presented at IEEE Globecom 2011 [1]. Digital Object Identifier 10.1109/TWC.2012.072512.111899
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - Chernoff bound
KW - Multiuser MIMO
KW - channel uncertainty
KW - interference alignment
KW - interference channels
KW - outage probability
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U2 - 10.1109/TWC.2012.072512.111899
DO - 10.1109/TWC.2012.072512.111899
M3 - Article
AN - SCOPUS:84868001114
SN - 1536-1276
VL - 11
SP - 3561
EP - 3573
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 10
M1 - 6251828
ER -