Multi-Gigabit Wireline Systems over Copper: An Interference Cancellation Perspective

TL;DR

This paper reviews interference cancellation techniques essential for achieving multi-gigabit data rates over copper lines, focusing on novel methods to mitigate crosstalk in high-bandwidth, full-duplex DSL systems.

Contribution

It provides an analysis of current and emerging interference cancellation techniques, proposing new approaches for efficient mitigation in next-generation high-speed copper line systems.

Findings

Enhanced interference cancellation methods for multi-gigabit DSL.

Analysis of challenges in high-frequency crosstalk mitigation.

Proposed novel approaches for future copper line technologies.

Abstract

Interference cancellation is the main driving technology in enhancing the transmission rates over telephone lines above 100 Mbps. Still, crosstalk interference in multi-pair digital subscriber line (DSL) systems at higher frequencies has not been dealt with sufficiently. The upcoming G.(mg) fast DSL system envisions the use of extremely high bandwidth and full-duplex transmissions generating significantly higher crosstalk and self-interference signals. More powerful interference cancellation techniques are required to enable multi-gigabit per second data rate transmission over copper lines. In this article, we analyze the performance of interference cancellation techniques, with a focus on novel research approaches and design considerations for efficient interference mitigation for multi-gigabit transmission over standard copper lines. We also detail novel approaches for interference cancellation in the upcoming technologies.