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Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems

Huang, Yezi LU ; Magesacher, Thomas LU ; Lu, Chenguang and Ödling, Per LU (2016) In IEEE Transactions on Communications 64(6). p.2610-2621
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Communications
volume
64
issue
6
pages
12 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:84976482723
ISSN
0090-6778
DOI
10.1109/TCOMM.2016.2561292
language
English
LU publication?
yes
id
a872c202-79d1-4f39-9bd9-5caf40927fa1
date added to LUP
2016-05-31 13:10:10
date last changed
2016-10-13 05:09:33
@misc{a872c202-79d1-4f39-9bd9-5caf40927fa1,
  abstract     = {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.},
  author       = {Huang, Yezi and Magesacher, Thomas and Lu, Chenguang and Ödling, Per},
  issn         = {0090-6778},
  language     = {eng},
  month        = {05},
  number       = {6},
  pages        = {2610--2621},
  publisher    = {ARRAY(0xb73a648)},
  series       = {IEEE Transactions on Communications},
  title        = {Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems},
  url          = {http://dx.doi.org/10.1109/TCOMM.2016.2561292 },
  volume       = {64},
  year         = {2016},
}