PLC-to-DSL Interference: Statistical Model and Impact on VDSL2, Vectoring, and G.Fast

Galli, Stefano; Kerpez, K.J.; Mariotte, Hubert; Moulin, F.

doi:10.1109/jsac.2016.2566118

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…We note that there are in fact many other external sources of interference in multi-pair DSL, most of which are however neither measurable nor static. Therefore, they do not constitute interfering channels and are more widely classified as noise, with the rare exception of alien crosstalk both from other DSL binders [48]- [50] and from the co-existing power line communication systems [51], [52]. The mathematical modelling of crosstalk channels is considerably different from that of direct channels.…”

Section: ) Crosstalk Channelmentioning

confidence: 99%

Far-End Crosstalk Mitigation for Future Wireline Networks Beyond G.mgfast: A Survey and an Outlook

Zhang

et al. 2020

IEEE Access

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With the escalating demand for high speed, high reliability, low latency, low cost and ubiquitous connectivity, the telecommunications industry is entering a new era where the ultimate optimality of the current wireline-wireless access network has to be achieved. Regarding the current wireline network paradigm, dominated by the copper-based digital subscriber lines (DSL) technology, multi-Gigabit data rate is the ambitious design objective at the customer end for the forthcoming ITU-T G.mgfast standard. In order to prepare for the new challenges in the era of total network convergence, both the wireline and the wireless community must be able to think beyond their respective conventions and learn from each other if necessary. Overall, the current DSL-based wireline network architecture is prone to the mutual interference resulting in far-end crosstalk (FEXT). The newly expanded 424/848 MHz spectrum of the ambitious G.mgfast project introduces far higher FEXT than that over the current 212/30 MHz G.fast/VDSL2 band. Additionally, the coexistence of multiple standards will also cause 'alien' FEXT. In these cases, using the plain zero forcing precoding (ZFP) will no longer attain a sufficiently high performance. However, as shown in the field of wireless communications, using lattice reduction as a signal space remapping technique significantly improves the performance of traditional multiuser detectors (MUD) and of the respective multiuser precoders (MUP). These promising techniques have largely remained unexploited in commercial wireless communications, due to their complexity in the face of the rapidly fluctuating wireless channels. In this survey, we present an overview of the state-of-the-art in wireline access network and an outlook for recent technological advances in the holistic 'wireline + wireless' access network in the context of network convergence, focusing on the dominant challenge of FEXT mitigation in future DSL networks. Against this background, we investigate both the family of linear precoding and of the Tomlinson-Harashima precoding (THP) schemes conceived for classic DSL. Furthermore, we present a tutorial on the family of lattice reduction aided MUPs, as well as quantifying their expected performances in realistic DSL scenarios. As a by-product, we also demonstrate the duality between MUP and MUD, in the hope that the fifty years' history of MUD could be used to accelerate the development of efficient near-optimal MUPs for future DSL. Under the recommended operating conditions of the 212 MHz profile of G.fast, our benchmark comparisons indicate that the lattice reduction aided techniques are very powerful compared to conventional schemes. In particular, their good performances do not rely on optimized spectrum balancing, and they are also shown to be relatively robust against channel state information (CSI) estimation error, under the assumption of perfectly time-invariant DSL channels.

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Section: ) Crosstalk Channelmentioning

confidence: 99%

Far-End Crosstalk Mitigation for Future Wireline Networks Beyond G.mgfast: A Survey and an Outlook

Zhang

et al. 2020

IEEE Access

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“…The concept of 5G-Home is based on the unified heterogeneous access-home network with wired and (optical) wireless connectivity, which is capable of creating tens of millions of additional 5G-Home sites. Technically, to succeed in a timely and affordable manner, both the existing copper or cable based fixed access and in-home wiring technique need to be exploited in addition to fibre [136], [137]. Deep in the home, the number of wireless APs and terminals will be going up corresponding to the increasing bandwidth, delay and coverage requirements.…”

Section: B Opportunities 1) 5g-homementioning

confidence: 99%

Localisation, Communication and Networking with VLC: Challenges and Opportunities

Zhang¹

2017

Preprint

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The forthcoming Fifth Generation (5G) era raises the expectation for ubiquitous wireless connectivity to enhance human experiences in information and knowledge sharing as well as in entertainment and social interactions. The promising Visible Light Communications (VLC) lies in the intersection field of optical and wireless communications, where substantial amount of new knowledge has been generated by multi-faceted investigations ranging from the understanding of optical communications and signal processing techniques to the development of disruptive networking solutions and to the exploitation of joint localisation and communications. Building on these new understandings and exciting developments, this paper provides an overview on the three inter-linked research strands of VLC, namely localisation, communications and networking. Advanced recent research activities are comprehensively reviewed and intriguing future research directions are actively discussed, along with the identifications of a range of challenges, both for enhancing the established applications and for stimulating the emerging applications.

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“…The characteristics of the cables determines the electromagnetic coupling between other technologies and twisted pairs. Accurate evaluation of the impact in terms of both average and worst‐case impact on data rate requires accurate modelling [2] to predict crosstalk within a bundle of twisted‐wire pairs [3]. Other important applications which utilize twisted pair cables include smart vehicles and aircraft systems [4].…”

Section: Introductionmentioning

confidence: 99%

Measurement and causal modelling of twisted pair copper cables

Yoho¹,

Riad

Muqaibel

2021

IET Science Measure & Tech

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The modelling of twisted pair copper cables has been under investigation in recent years with the emergence of several forms of digital subscriber line broadband access technology including G.fast. Designers of these communication systems implement these models to prototype early system architectures as well as simulate feasibility trials on the existing subscriber loop infrastructure. Previous attempts at modelling these cables have been limited because of the challenges associated with acquiring physical measurement and the inaccuracies of simulators to model effects such as the skin effect, which is significant when using these cables in high-speed systems. These previous modelling attempts employed empirical formulas to match the measured primary transmission line parameters (RLCG) of the cables and generally failed to meet the Kramer-Kronig causality relationships. This paper presents a measurement setup for the electrical properties of twisted pair copper cables as well as a realizable RLCG model for the cables. This model is based on electromagnetic theory considering the model causality, the skin effect, and the twisting of the cable.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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PLC-to-DSL Interference: Statistical Model and Impact on VDSL2, Vectoring, and G.Fast

Cited by 11 publications

References 30 publications

Far-End Crosstalk Mitigation for Future Wireline Networks Beyond G.mgfast: A Survey and an Outlook

Far-End Crosstalk Mitigation for Future Wireline Networks Beyond G.mgfast: A Survey and an Outlook

Localisation, Communication and Networking with VLC: Challenges and Opportunities

Measurement and causal modelling of twisted pair copper cables

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