Statistical Eye-Diagram Estimation Method for High Speed Channel with N-Tap Decision Feedback Equalizer (DFE)

Abstract

In this paper, we propose a statistical eye-diagram estimation method for a high-speed channel including N-tap decision feedback equalizer (DFE). This paper proposes a behavior model for the DFE to replace the DFE in the proposed method. The proposed behavior model fully describes the N-tap DFE, which results in successful eye-diagram estimation with the N-tap DFE. In order to show the effect of the DFE depending on its coefficients, this paper shows the corresponding estimated eye diagrams. For further analysis on the DFE, we also conducted parametric sweep on the coefficient with the proposed method. For verification, we provide a transient simulation under the same condition. From the comparison, the estimated and simulated eye diagrams are nearly the same. Therefore, this paper successfully proposes and verifies the statistical eye-diagram estimation method with the N-tap DFE for high-speed serial channels.