A Way to Reduce ICI of Multi-user MIMO-OFDM System with Precoding

In this paper we research that using the precoding based on signal-to-leakage-and-noise ratio (SLNR) to reduce the inter-carrier interference (ICI) of multi-user multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Firstly, a model of MIMO-OFDM with precoding system is introduced. Based on the model we get the algorithm of the precoding matrix. Through simulation and analysis, the ICI of MIMO-OFDM system with precoding is reduced, otherwise, the complexity of the receiver does not increase, so the method adapts to the downlink especially.