MMSE Transceiver design for coordinated base station systems: Distributive algorithm

This paper considers the joint transceiver design for multiple-input single-output (MISO) systems with coordinated base stations (BSs). We consider two problems; 1) minimizing the weighted sum of mean-square-error (MSE) with per BS antenna power constraint and 2) minimizing the total BS power with the target MSE and the per-antenna power constraints. To solve these problems, first, for fixed receivers, we propose a computationally efficient novel distributive algorithm to get the optimal BS precoders. The proposed algorithms use Lagrangian dual decomposition, modified matrix fractional minimization and an iterative method. Second, for fixed BS precoders, the receivers are updated by the minimum MSE (MMSE) criterion. These steps are repeated until convergence is achieved. All simulation results show that the solution of our proposed distributive algorithm fits to that of the centralized algorithm.