Direct prediction of linear equalization coefficients using raised cosine pulse shaping in frequency domain

Abstract

This paper presents a method to derive an equalizer target function for a given interconnect and data rate. This is achieved by requiring a raised cosine pulse spectrum at the receiver. A technique to estimate the raised cosine pulse roll-off factor β at the receiver is presented. The target transfer function is used to directly calculate the parameters of Feed Forward Equalizer (FFE) and Continuous Time Linear Equalizer (CTLE) for the interconnect. The proposed method avoids optimization and can be completely implemented in frequency domain. The achieved vertical eye opening shows good agreement with an iterative approach for up to 7 taps and adequate agreement up to 10 taps.