Performance analysis of zero forcing based multiuser MIMO downlink system under time variant channels

Abstract

This paper presents performance analysis of multiuser MIMO system based on the idea of zero forcing (ZF). Several modified ZF approaches are considered, which attempt to enlarge interference cancellation area from a pinpoint to an interval of certain width by using time variant weights or applying the strategies which have been adopted in classical array antennas. Through computer simulations, their effect to improve the SINR degradation and problem to be solved are shown.