Least-Squares Design of Chromatic Dispersion Compensation FIR Filters Realized with Overlap-Save Processing

TL;DR

This paper introduces a frequency domain least-squares method for designing chromatic dispersion compensation FIR filters using overlap-save processing, achieving improved results without increasing complexity.

Contribution

It presents a novel frequency domain least-squares design approach for chromatic dispersion filters that outperforms traditional time-domain methods without added computational cost.

Findings

Better dispersion compensation results than time-domain designs

No increase in overlap-save processing complexity

Effective frequency domain filter design method

Abstract

A design method for chromatic dispersion compensation filters realized using overlap-save processing in the frequency domain is proposed. Based on the idea to use the values that are normally zero-padded, better results than using optimal time-domain design are obtained without any modification of the overlap-save processing complexity.