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A Frequency-Dependent & Per-Port (FDPP) channel termination & renormalization method is presented as
a more accurate substitute for the traditional method which
uses frequency-independent, uniform impedance as the serialization/deserialization (SerDes) transmit (TX)/receive (RX)
termination impedances. Although the traditional method is
employed in practically all the existing high-speed interface
standards, the assumption of the constant, uniform termination
impedance at TX and RX is not exact and will lead to inaccuracy.
The performances of ENRZ (Ensemble NRZ) under
the interferences of crosstalk, in conjunction with NRZ (NonReturn-to-Zero), PAM4 (Pulse Amplitude Modulation of 4-level),
and PAM3 are investigated. One-side and two-side crosstalk scenarios with varying levels of crosstalk are studied. The simulated
eye-diagram obtained with the four signaling techniques under
a range of crosstalk levels are compared and the reasons that
lead to the prominent advantages of ENRZ are analyzed. As
an alternative approach of validating the performances of the