Precoder and Decoder Designs for a MIMO Interfering Broadcast Channel with Imperfect CSI

We study a joint linear precoder and decoder design in multicell multiuser with multiple input multiple output (MU-MIMO) system. The weighted mean square error (WMSE) minimization problem is studied in MU-MIMO interfering broadcast channel (IBC). Imperfect channel state information (CSI) due to channel estimation error at the receiver and antenna correlation at both MIMO-link ends is taken into account. Rayleigh fading with pathloss effect is considered in our system. Distance between base stations and distance from base station to its user equipments are taken into account. We propose an iterative algorithm to obtain a global minimum solution for expectation of WMSE minimization problem. The bisection method is used to find Lagrange multiplier value. Monte Carlo simulation method is used to obtain the results.