Low Complexity Precoders for Multicell Multiuser (MU) MIMO System

This paper deals with analysis and comparison of a Precoder design in a multicell multi user (MU) MIMO system on per cell basis in both competition and coordination mode. In competition mode base- station selfishly determines its precoding strategy based on the knowledge of inter-cell interference (ICI) at its connected mobile-stations (MS). In this mode a strategic non-cooperative game (SNG) is considered, therefore the existence and uniqueness of Nash equilibrium in SNG is analysed. Whereas in coordination mode, network weighted sum-rate (WSR) is maximized by jointly designing a Precoder for multiple base-stations (BSs). The main aim of the propose work is to analyze the block-diagonalization (BD) Precoding, BD-dirty paper coding (BD-DPC) Precoding and to compare these results with zero forcing (ZF) Precoding. Simulation result shows that by designing a Precoder jointly network sum-rate can be improved significantly, and ZF Precoding provides almost the same network sum rate with low complexity.