A Pre-Coding Scheme for Minimizing the Average BER Applicable to Cooperative Multi-Cell System

In this paper, we design a pre-coding method in cooperative multi-cell system, which is the singular value decomposition (SVD) processing followed by a power allocation scheme of minimizing the average BER of the system under a set of every base station (BS) transmit power constraints. This method further reduces the residual interference through power efficiently allocated among the data streams. Moreover, taking different channel state information (CSI) error variances among user equipments (UEs) into consideration, the proposed low-complexity pre-coding scheme is robust to imperfect CSI.