Vectored DSL: benefits and challenges for service providers

Zidane, R.; Huberman, Sean; Leung, Christopher; Le‐Ngoc, Tho

doi:10.1109/mcom.2013.6461200

Cited by 16 publications

(9 citation statements)

References 4 publications

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“…here Kxf = −22.5 dB and fk is the frequency on particular tone k in MHz [3].If α k is not dependent on any binder configuration then d coupling that is coupling length between two wire constant 1.2 km, that maximum length for VDSL3 [14] [15].The scaling factor, β k diag is used on the precoding matrix to insure the PSD mask constraint.…”

Section: --------------------------------------------(4) Where α K Ismentioning

confidence: 99%

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Performance of Zero forcing Pre-coder for Vectored DSL

Katiyar¹,

K.V.²

2016

IOSR

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Section: --------------------------------------------(4) Where α K Ismentioning

confidence: 99%

“…This technique is used to provider crosstalk free transmission, and increase the bit rate. Different type of pre-coder [3] [4] is use for downstream vectored transmission. Each pre-coder work on Different algorithms.…”

Section: Introductionmentioning

confidence: 99%

Performance of Zero forcing Pre-coder for Vectored DSL

Katiyar¹,

K.V.²

2016

IOSR

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“…One more technology that lends itself to be implemented at the incumbent's cabinet is the so-called "vectoring" able to provide an improved data rate and QoS by ideally eliminating the crosstalk disturbance that accompanies a signal having VDSL2 format [20,21]. It turns out to be a useful technology in an evolutionary scenario, such as that shown in Figure 2.…”

Section: Slu Limitations In Fttcab Architecturesmentioning

confidence: 99%

Unbundling in Current Broadband and Next-Generation Ultra-Broadband Access Networks

Gaudino

Giuliano

Mazzenga

et al. 2014

Fiber and Integrated Optics

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This article overviews the methods that are currently under investigation for implementing multi-operator open-access/shared-access techniques in nextgeneration access ultra-broadband architectures, starting from the traditional "unbundling-of-the-local-loop" techniques implemented in legacy twisted-pair digital subscriber line access networks. A straightforward replication of these copper-based unbundling-of-the-local-loop techniques is usually not feasible on next-generation access networks, including fiber-to-the-home point-to-multipoint passive optical networks. To investigate this issue, the article first gives a concise description of traditional copper-based unbundling-of-the-local-loop solutions, then focalizes on both next-generation access hybrid fiber-copper digital subscriber line fiber-to-the-cabinet scenarios and on fiber to the home by accounting for the mix of regulatory and technological reasons driving the next-generation access migration path, focusing mostly on the European situation.

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“…New G.fast system will be partially based on previous xDSL principles; moreover, it will include several upgrades and innovations to achieve higher transmission rates [4]. The frequency bands used by G.fast will be extended up to 106 or 212 MHz, which results in using 2048 or 4096 subchannels assuming subcarrier spacing of 51.75 kHz [6]. The discrete multi-tone modulation (DMT) will be enhanced by the process of vectoring [6] (VDMT) for the elimination of far-end crosstalk (FEXT), which is the dominant source of noises and disturbances in xDSL systems nowadays [7].…”

Section: Introductionmentioning

confidence: 99%

“…The frequency bands used by G.fast will be extended up to 106 or 212 MHz, which results in using 2048 or 4096 subchannels assuming subcarrier spacing of 51.75 kHz [6]. The discrete multi-tone modulation (DMT) will be enhanced by the process of vectoring [6] (VDMT) for the elimination of far-end crosstalk (FEXT), which is the dominant source of noises and disturbances in xDSL systems nowadays [7]. However, the application of VDMT and the process of DMT symbol coordination in large cable binders are computationally very demanding [8]; therefore, several scenarios with only partial VDMT application are being considered [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of phantom circuit benefits for next generation xDSL systems

Lafata

2014

Int J Communication

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This paper is focused on measurements and analysis of phantom mode benefits in G.fast and next generation xDSL systems. The investigation is based on real measurements performed for a multi-quad metallic cable together with theoretical evaluations of phantom circuit potentials. Because the presence of phantom circuits leads into increasing the summary crosstalk level in a metallic cable, the application of a phantom mode is questionable in practice. That is why the investigation was performed, and conclusions provided in this paper can be helpful to decide potential benefits of this method for future applications. The elimination of a crosstalk can be performed by using advanced modulation techniques such as vectored discrete multitone modulation (VDMT); however, its application in practice is limited because of its complexity and computational demands. That is why several scenarios are currently being discussed with either no VDMT application or with only partial crosstalk compensation. Because of that, this paper is focused on comparing the results for a first scenario without using any far-end crosstalk (FEXT) elimination technique, whereas a second scenario is based on partial FEXT suppression by VDMT application, to decide the effectiveness of using phantom modes in practice.

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Vectored DSL: benefits and challenges for service providers

Cited by 16 publications

References 4 publications

Performance of Zero forcing Pre-coder for Vectored DSL

Performance of Zero forcing Pre-coder for Vectored DSL

Unbundling in Current Broadband and Next-Generation Ultra-Broadband Access Networks

Investigation of phantom circuit benefits for next generation xDSL systems

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