Effect of periodic cable nonuniformities on transmission measurements

Borges, Gilvan; Rodrigues, Roberto M.; Costa, João Crisóstomo Weyl Albuquerque; Santos, Adam; Fertner, Antoni

doi:10.1109/i2mtc.2015.7151286

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Hence, spurious resonances in crosstalk measurements from short twisted-pair cables may come due to not perfectly matching the CM signals over the lines. In spite of copper cables are intended to carry differential-mode (DM) signaling, CM currents are present in differential transmission due to a number of factors like nonuniformities along the cable [10]. Although the CM current is much lower than the DM one (µA versus mA), it produces very high levels of emission.…”

Section: Resonances In Crosstalk Measurements Frommentioning

confidence: 99%

Crosstalk Measurement and Modeling for 5G Fixed Broadband Access Networks

Acatauassu,

Rodrigues,

Costa

2023

Anais Do XLI Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Crosstalk is the main interference limiting highspeed data transmission over short twisted-pair cables, such as the ones planned to be used in the 5 th generation (5G) fixed broadband access networks. Due to this fact, it must be accurately measured, characterized and modeled. However, the task of measuring crosstalk coupling functions from short cables is arduous due to the sensitivity of the measurement setup. In this work, we show an application of the Bob Smith termination technique to reduce electromagnetic interference (EMI) in crosstalk measurements using short twisted-pair copper cables. Experiments adopting a typical category 6 (Cat6) cable show that resonant components are reduced from the measured data when the Bob Smith termination is employed in the experimental setup. Then, using reliable measurement data, crosstalk modeling is performed using a 1% worst-case model.

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Section: Resonances In Crosstalk Measurements Frommentioning

confidence: 99%

Crosstalk Measurement and Modeling for 5G Fixed Broadband Access Networks

Acatauassu,

Rodrigues,

Costa

2023

Anais Do XLI Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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“…Previous works have indicated how non-uniformities can be harmful to the transmission over copper cables, e.g. generating a selective filter-like behavior for specific frequencies [7] and impedance changes [8].…”

Section: Non-uniformities and Their Influence On Cable Propertiesmentioning

confidence: 99%

Impact of Cable Non-uniformities on the Performance of Copper Fronthaul Exploiting the Phantom Mode Transmission

Ohashi¹,

Borges²,

Rodrigues³

et al. 2017

Anais De XXXV Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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The fronthaul of the future 5G networks is expected to be the bottleneck for coping with the increasing data traffic demand. Despite optical fiber is the preferred alternative for fronthaul, technologies like phantom mode has boosted the data rates over copper lines. Previous works have investigated the application of phantom mode and its interaction with differential channels, but none has addressed the potential impact of the cable non-uniformities on the overall performance of copperbased networks. In this work we carried out simulations in order to investigate such impact on both ordinary differential and phantom channels. The obtained results indicate that nonuniformities must be taken into account for realistic data rate analysis in next-generation networks.

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Effect of periodic cable nonuniformities on transmission measurements

Cited by 2 publications

References 4 publications

Crosstalk Measurement and Modeling for 5G Fixed Broadband Access Networks

Crosstalk Measurement and Modeling for 5G Fixed Broadband Access Networks

Impact of Cable Non-uniformities on the Performance of Copper Fronthaul Exploiting the Phantom Mode Transmission

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