On the MSI mitigation for MIMO UWB time reversal systems

A Multi-Input Multi-Output (MIMO) Ultra-Wide Band (UWB) communication system with Time Reversal (TR) is investigated in this paper. The system uses spatial multiplexing (SM) scheme to achieve high data rate. In order to cope with long delay spread of the UWB channel, time reversal technique is adopted at transmitter. Later a Multi Stream Interference (MSI) mitigation algorithm based on Zero Forcing (ZF) is proposed. The proposed ZF algorithm requires the knowledge of the channel state information (CSI), which is already available for time reversal at tranmitter. Simulation results show that the algorithm can considerably improve the BER performance of the system when the number of data streams is large (ges 3). This paper focuses on MIMO single user cases, however, the proposed MIMO-TR-UWB can be also extended to MIMO broadcasting system.