MIMO Pre-Equalization With Decision Feedback for High-Speed Chip-to-Chip Communication

In this contribution, we present a multiple-input multiple-output (MIMO) transceiver scheme for very high-speed off-chip communication over low-cost electrical interconnects. Linear MIMO pre-equalization at the transmitter is combined with decision feedback equalization (DFE) at the receiver to counteract the adverse effect of inter symbol interference (ISI) and crosstalk (XT). Elegant closed-form expressions for the minimum mean square error equalization filters are derived under a total transmit energy constraint. Numerical analysis shows that the combination of linear MIMO pre-equalization and MIMO DFE allows to significantly improve the reliability of future high-speed off-chip communication.