Signal Processing for Gigabit-Rate Wireline Communications

TL;DR

This paper surveys advanced signal processing techniques for G.fast wireline communication systems, emphasizing interference mitigation challenges posed by higher bandwidth and crosstalk, and reviews VDSL methods for potential adaptation.

Contribution

It provides a comprehensive overview of current research challenges and novel approaches in signal processing for G.fast, highlighting limitations of existing VDSL techniques.

Findings

High levels of crosstalk at G.fast bandwidths require new mitigation techniques.

Existing VDSL methods have limitations when applied to G.fast.

Research challenges include designing efficient algorithms for interference mitigation.

Abstract

Signal processing played an important role in improving the quality of communications over copper cables in earlier DSL technologies. Even more powerful signal processing techniques are required to enable a gigabit per second data rate in the upcoming G.fast standard. This new standard is different from its predecessors in many respects. In particular, G.fast will use a significantly higher bandwidth. At such a high bandwidth, crosstalk between different lines in a binder will reach unprecedented levels, which are beyond the capabilities of most efficient techniques for interference mitigation. In this article, we survey the state of the art and research challenges in the design of signal processing algorithms for the G.fast system, with a focus on novel research approaches and design considerations for efficient interference mitigation in G.fast systems. We also detail relevant VDSL techniques and points out their strengths and limitations for the G.fast system.