Common-mode data transmission using the binder sheath in digital subscriber lines

Jagannathan, S.; Pourahmad, V.; Seong, Kibeom; Cioffi, J.M.; Ouzzif, Meryem; Tarafi, R.

doi:10.1109/tcomm.2009.03.070050

Cited by 13 publications

(10 citation statements)

References 14 publications

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“…Since trenching for new fiber infrastructure is prohibitively costly and time consuming, there is renewed interest in techniques such as common-mode data transmission [1] and crosstalk reduction, which maximize the capacity of the existing copper infrastructure [2]. Recent advances in the suppression of in-domain far-end crosstalk (self-FEXT) [3]- [5] have allowed multi-carrier Digital Subscriber Loop (DSL) systems such as VDSL2 [6] and ADSL2+ [7] to achieve very high bidirectional data rates over twisted-pairs of copper wires.…”

Section: Introductionmentioning

confidence: 99%

Alien crosstalk mitigation in vectored DSL systems for backhaul applications

Awasthi

Al-Dhahir

Eliezer

et al. 2012

2012 IEEE International Conference on Communications (ICC)

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The performance of digital subscriber line (DSL) systems, such as ADSL and VDSL is limited by crosstalk. Suppression of in-domain far-end self crosstalk using vectoring technology enables very high bidirectional data rates over twisted-pairs of copper wires. However, the performance of vectored DSL systems is severely degraded in the presence of alien or out-of-domain crosstalk that arises from sources that lie outside the vectored DSL system and share the same cable binder. In this paper, we propose a practical, non-iterative, high performance algorithm for alien crosstalk mitigation. Simulation results and complexity analysis corresponding to a vectored VDSL2 system in presence of alien crosstalk are presented to illustrate the significant performance gains of the proposed algorithm and its low implementation complexity.

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Section: Introductionmentioning

confidence: 99%

Alien crosstalk mitigation in vectored DSL systems for backhaul applications

Awasthi

Al-Dhahir

Eliezer

et al. 2012

2012 IEEE International Conference on Communications (ICC)

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“…Although this configuration can provide significant improvement in data rate, the presence of ingress or egress limits the potential use of split-pair (usually not twisted) signalling. A CM channel model has also been suggested in [5] by considering the metallic-sheath of the binder as a common reference. This configuration (of 2N modes) is more reliable than the split-pair signalling and significantly reduces the effect of ingress and egress on the binder provided the metallic sheath is grounded properly.…”

Section: Common-mode Channel Modelmentioning

confidence: 99%

“…As discussed earlier, the vectored model in [5] has the resultant channel matrix of size 2N × 2N and thus increases the complexity further for the implementation of equalizers. Therefore, instead of the step involved in (23), we formulate a new N-dimensional CM-DM system model by exploiting (16) for each TP and vectorizing the resultant signals as…”

Section: Vectored Cm-dm Processingmentioning

confidence: 99%

“…It is shown in [4] that this CM signal can be readily obtained with very little extra hardware. The CM channel can also be realized by using an alternative reference point like binder sheath [5] or one of the wires in the binder [6].…”

Section: Introductionmentioning

confidence: 99%

“…To further enhance the performance by canceling a large number of disturbers, CM-aided receive processing combined with vectored transmissions is well motivated for the considered system [22]. Recently, transmission of signals in the CM channel along with the co-reception of CM signals has also been studied in [5].…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of a common-mode signal based low-complexity crosstalk cancelation scheme in vectored VDSL

Zafaruddin

Prakriya

Prasad

2012

EURASIP J. Adv. Signal Process.

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In this article, we propose a vectored system by using both common mode (CM) and differential mode (DM) signals in upstream VDSL. We first develop a multi-input multi-output (MIMO) CM channel by using the single-pair CM and MIMO DM channels proposed recently, and study the characteristics of the resultant CM-DM channel matrix. We then propose a low complexity receiver structure in which the CM and DM signals of each twisted-pair (TP) are combined before the application of a MIMO zero forcing (ZF) receiver. We study capacity of the proposed system, and show that the vectored CM-DM processing provides higher data-rates at longer loop-lengths. In the absence of alien crosstalk, application of the ZF receiver on the vectored CM-DM signals yields performance close to the single user bound (SUB). In the presence of alien crosstalk, we show that the vectored CM-DM processing exploits the spatial correlation of CM and DM signals and provides higher data rates than with DM processing only. Simulation results validate the analysis and demonstrate the importance of CM-DM joint processing in vectored VDSL systems.

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