Simple and causal twisted-pair channel models for G.fast Systems

Acatauassu, Diogo; Höst, Stefan; Lu, Chenguang; Berg, Miguel; Klautau, Aldebaro; Börjesson, Per Ola

doi:10.1109/glocom.2013.6831504

Cited by 16 publications

(38 citation statements)

References 3 publications

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“…According to the results presented in [24], [26], the proposed KM1, KM2, and KM3 models are suitable for frequencies of hundreds of MHz.…”

Section: Introductionmentioning

confidence: 93%

“…However, these phenomena are simply neglected in this work, and the presented model and modeling is based on a simplification that each twisted pair in a multiline metallic cable is an isolated loop without any impact on surrounding twisted pairs within the same cable. On the other hand, the same simplification was also made for all existing models used in comparisons [11], [22], [24] and [26]. Because of that, the modeling presented in this paper should be extended for multiline environment to overcome the simplification for G.fast lines in practice.…”

Section: Modeling Of Transmission Linesmentioning

confidence: 99%

“…This model (6) became one of the most popular metallic line attenuation models, because it usually provides sufficient accuracy over wide frequency band for various types of telecommunication cables. The accuracy of the model was also validated by mathematical derivation presented in [26] in which the causality of Chen's model was corrected, and the resulting model was referred as KM1. The phase constant, β(f), is in the KM1 model approximated as (7) β…”

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

“…Thanks to that, only 3k-parameters are necessary to approximate both the real and imaginary parts of the propagation constant γ(f). Further improvements by applying the Hilbert transform into KM1 model by Acatauassu et al led into introducing KM2 and KM3 models in [26], both containing more k-parameters and providing better accuracy. The KM2 model is in [26] specified as (8)…”

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

“…Evidently, one extra term with a k 4 parameter was added for modeling of an attenuation constant α(f), while the model for β(f) is completely the same as in KM1 model. Finally, the KM3 model presented again in [26] is expressed as (9):…”

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

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Accurate low complexity modeling of twisted pairs suitable for G.fast frequencies

Lafata

2015

Int J Communication

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SUMMARYAs the higher and higher frequency bands of existing metallic cables in access networks are being continuously exploited by modern transmission technologies, such as the G.fast, the necessity of providing accurate and suitable modeling of their transmission characteristics is evident. Therefore, this paper is focused on modeling of a propagation constant of twisted pairs and metallic cables at high frequencies up to 250 MHz, and an innovative arsinh model is proposed and described. This new model is based on an idea of adopting inverse hyperbolic sine function for modeling of both secondary line coefficients, attenuation constant and phase constant, and its main motivation is to provide their accurate estimations for G.fast frequencies up to 250 MHz for various types of metallic cables while maintaining a low computational complexity. The proposed model was compared with numerous characteristics measured for various real metallic cables as well as with several existing models in order to illustrate its potential. The results, which are presented within this paper, clearly illustrate that the proposed arsinh model generally outperforms existing standard models based on the equal number of required parameters.

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“…According to the results presented in [24], [26], the proposed KM1, KM2, and KM3 models are suitable for frequencies of hundreds of MHz.…”

Section: Introductionmentioning

confidence: 93%

Section: Modeling Of Transmission Linesmentioning

confidence: 99%

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

Section: Gfast Itu-t G9701 Model (Kpn)mentioning

confidence: 99%

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Accurate low complexity modeling of twisted pairs suitable for G.fast frequencies

Lafata

2015

Int J Communication

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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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Design Analysis and Evaluation of a W-Element Model for a Twisted-Pair Cable

2020

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Unlike the twisted pair cable's simple installation mechanism, evaluating a circuit equivalent and certifying it is not very convenient anymore. Although the best way to model transmission lines is to use the field solver software programs such as ANSYS Maxwell or HFSS, this procedure is very overwhelming and time-consuming. This paper presents a straightforward approach to extract a W-element model for the twisted pair cable based on its structural and electrical characteristics. The W-element model employs a novel state-of-the-art transmission line simulation method which is very fast, accurate and robust. Both system designers and cable manufacturers can easily exploit the presented equations and the derived models to predict the behavior of the balanced transmission lines with two conductors using simulators such as HSpice, etc. Nexans unshielded CAT6 twisted pair cable, one of the most common types of cables used in today's networks, is selected as a case study in this paper to verify the proposed model. A variety of simulations have been carried out to evaluate the performance and accuracy of the proposed model. Furthermore, the validity of the model is assessed against the real Fluke test results. INDEX TERMS Twisted pair cable, W-element, Transmission line modeling, Fluke test, RLGC model. I. NOMENCLATURE ε 0 Permittivity of free space ε r Relative permittivity of material µ0 Magnetic permeability of free space µr Relative magnetic permeability of material ρ Specific electrical resistance of material σ DC conductivity of the insulation material δ Skin depth f Frequency d Diameter of the conductor D Center to center separation of the conductors H Height of the wire above the ground NVP Nominal Velocity of Propagation tan(δ) Loss tangent of insulation material kp Correction factor of proximity effect l Length of wire lmax Maximum length of RLGC element LCable Cable jacket length Lwire Wire's electrical length Lwire-pitch Wire's pitch length

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Simple and causal twisted-pair channel models for G.fast Systems

Cited by 16 publications

References 3 publications

Accurate low complexity modeling of twisted pairs suitable for G.fast frequencies

Accurate low complexity modeling of twisted pairs suitable for G.fast frequencies

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

Design Analysis and Evaluation of a W-Element Model for a Twisted-Pair Cable

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