Rate balancing for multiuser multicell downlink MIMO systems

Ghamnia, Imène; Slock, Dirk TM; Yuan-Wu, Yi
EUSIPCO 2019, 27th European Signal Processing Conference, 2-6 September 2019, Coruna, Spain

In this paper, we consider rate balancing problem for the Multiple-Input Multiple-Output (MIMO) Interfering Broadcast Channel (IBC), i.e. the multiuser multicell downlink
(DL). We address the MIMO DL beamformer design and power allocation for maximizing the minimum weighted user rate with sum-power constraint with the weighting reflecting user priorities. The proposed solution is based on reformulating
the max-min user rate optimization problem into a weighted Mean Squared Error (MSE) balancing problem. Employing MSE duality between DL channel and its equivalent Uplink (UL) channel, we propose an iterative algorithm to jointly design the
transceiver filters and the power allocation. Simulation results verify the computational efficiency of the proposed algorithm and provide appreciable performance improvements as compared to optimizing the conventional unweighted per user MSE.

Systèmes de Communication
Eurecom Ref:
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