  To deal with the ever increasing data rate demand in wireless systems,
suitable backhaul solutions have to be found. One option is to use LOS MIMO
systems at mmWave frequencies, as high bandwidths and spectral efficiencies
will be able to fulfill this requirement. Several investigations have shown,
that phase noise can decimate the efficiency of such systems immensely and
needs to be adequately dealt with. In this work we investigate the system level
performance of LOS MIMO systems subject to this impairment and examine the
influence for various practical phase noise values. Furthermore, it is shown
how a simple phase noise compensation algorithm can be used to enhance the
performance of these systems in different scenarios.
