Order Determination of the Multiple Edge Response Method for Nonlinear Links

As data rates of high-speed links increase, the impact of nonlinearity is becoming more and more prominent. To capture the effect of nonlinear behaviors on the system response, the multiple edge response (MER) method was proposed for nonlinear systems. High order MER can capture sufficient nonlinearity and achieve accurate results. However, it is quite time-consuming to obtain a large amount of edge responses for the higher order MER. Therefore, it is necessary to study the minimum required order of MER to estimate the system performance. In this work, a simple and efficient method based on multiple pulse responses is proposed to estimate the minimum required order of MER. The accuracy of the proposed method is validated by simulation for a nonlinear high-speed link.