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On the capacity of multiuser MIMO networks with interference

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5 Author(s)
Jia Liu ; Virginia Polytech. Inst. & State Univ., Blacksburg ; Hou, Y.T. ; Yi Shi ; Sherali, H.D.
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Maximizing the total mutual information of multiuser multiple-input multiple-output (MIMO) systems with interference is a challenging problem. In this paper, we consider the power control problem of finding the maximum sum of mutual information for a multiuser network with mutually interfered MIMO links. We propose a new and powerful global optimization method using a branch-and-bound (BB) framework, coupled with a novel reformulation-linearization technique (RLT). The proposed BB/RLT guarantees finding a global optimum for multiuser MIMO networks with interference. To reduce the complexity of BB/RLT, we propose a modified BB variable selection strategy to accelerate the convergence process. Numerical examples are also given to demonstrate the efficacy of the proposed solution.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:7 ,  Issue: 2 )