Parameter for near end crosstalk prediction in twisted pair cables

Ogundapo, Olusegun; Duffy, Alistair; Nche, Charles

doi:10.1109/isemc.2016.7571696

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Although the electronic equipment used in this study was manufactured in accordance with EMC directive, it does not mean that overall radiation from telecommunications network in user premises meets the radiation limits defined by the international authorities. The reason for this is that the telecommunications network in addition to electronic equipment also consists of existing copper telecommunications cables that are not usually designed to transmit data at frequencies used by G.fast2 technology, resulting in increased radiation when the signal passes through it [28]. Therefore, in order to analyse the influence of cable construction on the measured level of E ‐field radiation, the measurement is performed for different types of telecommunication cables.…”

Section: Measurement Setupmentioning

confidence: 99%

Analysis of the radiated electric field strength from in‐house G.fast2 data carrying wire‐line telecommunication network

Milanovic

Budisa

2021

IET Science Measure & Tech

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G.fast profile 212a technology is the perfect choice for an operator offering a broadband service, as it operates using the existing copper telecommunications infrastructure (cables) already installed in user premises. Unfortunately, such telecommunications infrastructure is not designed to transmit data at high frequencies used by G.fast technology, resulting in radiation during signal transmission. This radiation can have a direct impact on the performance and reliability of radio services operating in the same frequency range. In order to limit such radio interference, International Telecommunication Union proposed radiation limits for wired telecommunications networks. This paper provides a comparison between ITU-T K.60 Recommendation with the measurements of the electric field radiation from the telecommunications network when the G.fast profile 212a signal is transmitted through different types of telecommunications cables. The aim of this comparison is to assess whether the radiation from the telecommunications network in this study meets the radiation limits defined in ITU-T K.60 Recommendation and, therefore, whether this radiation can be a source of interference to radio services operating in the same frequency range. In addition, this paper provides an analysis of the impact of cable construction on the total irradiated field from the in-house part of the telecommunications network.

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Section: Measurement Setupmentioning

confidence: 99%

Analysis of the radiated electric field strength from in‐house G.fast2 data carrying wire‐line telecommunication network

Milanovic

Budisa

2021

IET Science Measure & Tech

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“…(57) Because the choice of constellation is shared by all pairs on the same tone for the LR-ZFP and the LR-THP, we emphasize this fact by neglecting the pair index j for the terms ρ t and P t in Eq. (56) and (57). In terms of the transmitter's power transfer characteristics between the input u u u t and the output x x x t , Eq.…”

Section: ) Inner Spectrum Balancing Policymentioning

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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A Novel Method for Predicting Crosstalk in Lossy Twisted Pair Cable Based on Beetle Antennae Search and Implicit Wendroff FDTD Algorithm

Zhou

Yan

et al. 2021

Electromagnetics

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Parameter for near end crosstalk prediction in twisted pair cables

Cited by 5 publications

References 4 publications

Analysis of the radiated electric field strength from in‐house G.fast2 data carrying wire‐line telecommunication network

Analysis of the radiated electric field strength from in‐house G.fast2 data carrying wire‐line telecommunication network

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

A Novel Method for Predicting Crosstalk in Lossy Twisted Pair Cable Based on Beetle Antennae Search and Implicit Wendroff FDTD Algorithm

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