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Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems

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Author

  • Yezi Huang
  • Thomas Magesacher
  • Chenguang Lu
  • Per Ödling

Summary, in English

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.

Publishing year

2016-05-02

Language

English

Pages

2610-2621

Publication/Series

IEEE Transactions on Communications

Volume

64

Issue

6

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Telecommunications

Status

Published

Research group

  • Broadband Communication

ISBN/ISSN/Other

  • ISSN: 0090-6778