Fast Mitigation of Sudden Termination Changes in Wideband Wireline Systems

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Ericsson AB
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Telekommunikation
Originalspråkengelska
Sidor (från-till)2610 - 2621
Antal sidor12
TidskriftIEEE Transactions on Communications
Volym64
Utgivningsnummer6
StatusPublished - 2016 maj 2
PublikationskategoriForskning
Peer review utfördJa