Coupled-Band ESSFM for Low-Complexity DBP

TL;DR

This paper introduces a new low-complexity digital backpropagation method combining perturbation theory, subband processing, and splitting ratio optimization, achieving significant performance gains with fewer computations.

Contribution

The novel coupled-band ESSFM technique improves digital backpropagation efficiency by integrating multiple advanced methods for the first time.

Findings

Achieves up to 0.91 dB gain over dispersion compensation.

Requires significantly fewer multiplications per 2D-symbol.

Outperforms existing DBP techniques in efficiency and effectiveness.

Abstract

We propose a novel digital backpropagation (DBP) technique that combines perturbation theory, subband processing, and splitting ratio optimization. We obtain 0.23 dB, 0.47 dB, or 0.91 dB gains w.r.t. dispersion compensation with only 74, 161, or 681 real multiplications/2D-symbol, improving significantly on existing DBP techniques.