An efficient and robust method to determine the optimal tap coefficients of high speed FIR equalizer

Abstract

The FIR equalizer is a common way to compensate for the effect of ISI in high speed data transmission. One key issue for the FIR equalizer design is to find the optimal tap coefficient (TC) set. In this work, the TC search is formulated as an eye-diagram based global optimization problem and an efficient and robust multi-start point (MSP) optimizer is developed and applied to determine the optimal TC set. To guarantee a robust optimization procedure, an objective function based on the eye diagram is studied. It proves that a 330x speedup is provided by the proposed method as compared with the Monte Carlo method. With the proposed method, the optimal design point of the equalizer can be further estimated.

摘要

FIR 均衡器通常用于补偿高速数字通信中的码间干扰。 如何找到最优抽头系数是设计 FIR 均衡器的关键环节。 在本次研究中, 抽头系数的搜索被转化成一个基于眼图的全局优化问题。 一个高效稳定的多起始点优化程序被研究并用于选择最优抽头系数。 为了保证优化过程的稳定性, 文章提出并研究了基于眼图的目标函数。 实验证明提出的方法在搜索速度上比蒙特卡罗方法提高了 330 倍。 通过提出的搜索方法, 均衡器的最优设计点可以进一步被估测。