Capacity for the uplink channel of a single cell multiuser MIMO systems with antenna mutual coupling effect included

Abstract

The MIMO capacity for a single cell multiple-input and six outputs multiuser MIMO system is investigated. The channel model consists of an antenna array at each mobile terminal, the Rayleigh fading channel from the user to the base station, and also an antenna array at base station. The channel State Information (CSI) is assumed to be always known at the base station, thus successive decoding for multiuser can be utilized. It is found that the capacity drops when antenna mutual coupling becomes severe with smaller antenna separations at the user terminals. Simulation results also indicate that as the number of antennas used by mobile terminals doubles or triples, or as the cochannel user group in the cell enlarges, the total channel capacity significantly increases. Simulation results of some typical examples are presented to illustrate our findings. ©2009 IEEE.