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Linear Multiuser MIMO Transceiver Design With Quality of Service and Per-Antenna Power Constraints

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3 Author(s)
Tolli, A. ; Centre for Wireless Commun., Oulu Univ., Oulu ; Codreanu, M. ; Juntti, M.

Joint design of linear multiuser multiple-input-multiple-output (MIMO) transceiver subject to different quality of service (QoS) constraints per user and with per-antenna or antenna group power constraints is considered. Solutions for two linear transceiver optimization problems are proposed, i.e., balancing the weighted signal-to-interference-plus-noise ratio (SINR) per data stream and balancing the weighted rate for each scheduled user with minimum rate requirements per user. The proposed joint transceiver optimization algorithms are compared to corresponding optimal nonlinear transmission methods as well as to generalized zero-forcing transmission solutions. Unlike the optimal nonlinear schemes, the optimization problems employed in the linear multiuser MIMO transceiver design are not convex in general. However, the proposed algorithms are shown to provide very efficient solutions despite of the fact that the global optimum cannot be guaranteed due to nonconvexity of the problems.

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Signal Processing, IEEE Transactions on  (Volume:56 ,  Issue: 7 )