Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems
Författare
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.
Publiceringsår
2016-05-02
Språk
Engelska
Sidor
2610-2621
Publikation/Tidskrift/Serie
IEEE Transactions on Communications
Volym
64
Issue
6
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Telecommunications
Aktiv
Published
Forskningsgrupp
- Broadband Communication
ISBN/ISSN/Övrigt
- ISSN: 0090-6778