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Research Paper | Electronics & Communication Engineering | India | Volume 4 Issue 6, June 2015

Low Complexity Precoders for Multicell Multiuser (MU) MIMO System

Md. Ashfaque Alam | Siddappaji

Abstract: 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.

Keywords: MIMO, ICI, Nash equilibrium, CoMP, BD Precoding, ZF Precoding

Edition: Volume 4 Issue 6, June 2015,

Pages: 772 - 776