Binder MIMO Channels

Liu, Bin; Cioffi, J.M.; Jagannathan, S.; Seong, Kibeom; Kim, Young-Jae; Mohseni, Mehdi; Brady, M.H.

doi:10.1109/tcomm.2007.902597

Cited by 29 publications

(41 citation statements)

References 14 publications

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“…The performance of the proposed bit loading algorithm was assessed through simulations, wherein the rate as a function of the reach was evaluated for a 10-pair MIMO-VDSL channel generated using Bin Lee's channel model [7]. The wire diameter is 0.5 mm (24-AWG).…”

Section: Resultsmentioning

confidence: 99%

“…The most traditional power allocation method is the water lling (WF) algorithm [3,7], which assumes that the signals are jointly processed at both ends of the communication link and that the total power to be transmitted, i.e., the sum of the powers of all lines involved, is limited. One drawback of water lling is that it does not take into account any constraint on the power transmitted through each line.…”

Section: Existing Bit Allocation Algorithmsmentioning

confidence: 99%

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Bit Loading for Precoded DSL Systems

Filho

Lopes

Ferrari

et al. 2007

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07

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Crosstalk is one of the main impairments of digital subscriber line (DSL) systems. To combat this impairment, several techniques were proposed in the literature that employ some form of precoding in the downstream. However, most existing bit allocation algorithms are not applicable to precoded DSL systems when the power in each transmission line is constrained. In this paper, we propose a bit allocation algorithm for this scenario. The proposed algorithm maximizes the bit rate given the available power. It somewhat extends single-user algorithms in that it sequentially allocates bit to the "best" user and tone. In the proposed algorithm we use a de nition of "best" that is suitable for precoded systems. Simulation results show that the proposed algorithm achieves almost the same rates as those of power allocation algorithms, which do not take into account the discrete nature of the transmitted information.

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Section: Resultsmentioning

confidence: 99%

Section: Existing Bit Allocation Algorithmsmentioning

confidence: 99%

Bit Loading for Precoded DSL Systems

Filho

Lopes

Ferrari

et al. 2007

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07

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“…However, an analytical model for the CM channel is not well studied in the literature. In [6], a split-pair signaling (based on the multi-conductor transmission-line theory) that offers 2N -1 modes of transmissions in a binder of N pairs is presented by considering one of the wires as a joint common reference for all other wires. 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.…”

Section: Common-mode Channel Modelmentioning

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%

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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“…Compared to previous work in the area-most notably [4]-MTL determines the exact solution for the capacitance matrix of the wire system solving a linear system of equations. Using exact capacitance results is particularly important for modeling alternative modes.…”

Section: Introductionmentioning

confidence: 99%

MTL—A Multi-Wire Transmission Line Modeling Toolbox

Magesacher¹

2013

IJCEE

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Abstract-Emerging wireline transmission systems aspire to deliver rates in the order of Gbit/s over short copper cables by exploiting higher frequencies and non-differential transmission modes. Reliable channel models are a prerequisite for system design and throughput predictions. In this paper, a MATLAB-based multi-wire transmission line modeling toolbox called MTL is presented. Based on Kelvin-model theory, MTL allows modeling of virtually any property (spanning the entire range from electrical properties such as voltages, currents, and impedances to system-level properties such as insertion loss or Shannon capacity) of multi-wire cables with arbitrary wire geometry. Compared to prior art, MTL allows exact computation of the capacitance matrix in a multi-wire system. Examples demonstrate the importance of this feature. IndexTerms-Channel modeling, kelvin model, multi-conductor transmission line modeling, wireline communications.

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Binder MIMO Channels

Cited by 29 publications

References 14 publications

Bit Loading for Precoded DSL Systems

Bit Loading for Precoded DSL Systems

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

MTL—A Multi-Wire Transmission Line Modeling Toolbox

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