Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems

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Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems. / Huang, Yezi; Magesacher, Thomas; Lu, Chenguang; Ödling, Per.

I: IEEE Transactions on Communications, Vol. 64, Nr. 6, 02.05.2016, s. 2610 - 2621.

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Huang, Yezi ; Magesacher, Thomas ; Lu, Chenguang ; Ödling, Per. / Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems. I: IEEE Transactions on Communications. 2016 ; Vol. 64, Nr. 6. s. 2610 - 2621.

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TY - JOUR

T1 - Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems

AU - Huang, Yezi

AU - Magesacher, Thomas

AU - Lu, Chenguang

AU - Ödling, Per

PY - 2016/5/2

Y1 - 2016/5/2

N2 - Vectoring enables cooperative crosstalk mitigation in wideband wireline systems. A sudden termination change within a vectored group alters the entire perceived channel matrix and thus disturbs the vectoring operation since the precoder, which is tuned to the channel before the change, is no longer up to date. We analyze the resulting residual crosstalk and its impact on performance degradation during showtime for both linear and non-linear precoding systems. To cover, a new channel matrix must be estimated to update the precoder accordingly. We use a model-based approach to track a vector instead of estimating the full matrix. Based on this vector, simplified precoder updating methods for both precoding systems are presented accounting for a sudden line deactivation or (re)activation in a vectored group. As an alternative to the state-of-the-art methods, the proposed procedures significantly reduce the complexity of both channel estimation and precoder updating and minimize the disturbed period for active users.

AB - Vectoring enables cooperative crosstalk mitigation in wideband wireline systems. A sudden termination change within a vectored group alters the entire perceived channel matrix and thus disturbs the vectoring operation since the precoder, which is tuned to the channel before the change, is no longer up to date. We analyze the resulting residual crosstalk and its impact on performance degradation during showtime for both linear and non-linear precoding systems. To cover, a new channel matrix must be estimated to update the precoder accordingly. We use a model-based approach to track a vector instead of estimating the full matrix. Based on this vector, simplified precoder updating methods for both precoding systems are presented accounting for a sudden line deactivation or (re)activation in a vectored group. As an alternative to the state-of-the-art methods, the proposed procedures significantly reduce the complexity of both channel estimation and precoder updating and minimize the disturbed period for active users.

U2 - 10.1109/TCOMM.2016.2561292

DO - 10.1109/TCOMM.2016.2561292

M3 - Article

VL - 64

SP - 2610

EP - 2621

JO - IEEE Transactions on Communications

T2 - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

SN - 0096-1965

IS - 6

ER -