Crosstalk Cancellation on High-Speed Interconnects Through a MIMO Linear Precoding

One of the main problems of multiple-input multiple-output (MIMO) high-speed interconnect (HSI) circuits that use single-ended signaling is crosstalk phenomena. Crosstalk is an unintentional coupling of the transmitted signals due to close spacing between transmission lines that distorts the information bearing symbols. A novel model for uniform or nonuniform multiconductor transmission line based on the S-parameters is proposed. It allows representation of an HSI as a MIMO channel. In addition, a linear precoding scheme stands on the aforementioned signal model and wireless digital precoding. The precoder generates eigen-beam patterns designed to avoid crosstalk. This research employs practical HSI circuits used in system-in-package at data rates of 2 Gb/s. Statistical link simulation results are presented to analyze and verify the performance and benefits in terms of signal integrity quality of the signal model and the linear precoder proposed.