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Linear and nonlinear precoding based dynamic spectrum management for downstream vectored G.fast transmission

Boekbijdrage - Boekhoofdstuk Conferentiebijdrage

© 2015 IEEE. In the G.fast frequency range (up to 212 MHz), the diagonal dominance structure of the channel matrix is no longer valid at the higher frequencies. As a result, the linear Zero Forcing (ZF) precoder in combination with dynamic spectrum management (DSM) is no longer near-optimal for downstream vectored G.fast transmission. To boost performance, we develop a novel low-complexity algorithm for both linear and non-linear precoding based DSM that maximizes the weighted line sum-rate under realistic per-line total power and per-tone spectral mask constraints. The algorithm relies on a Lagrange multiplier based transformation of the downstream dual decomposition approach formulation into its dual upstream formulation, together with a low-complexity iterative fixed-point formula to solve the resulting upstream problems. Simulations with measured G.fast channel data up to both 106 and 212 MHz are provided revealing a significantly increased performance of this algorithm over linear ZF precoding.
Boek: Proc. 2015 IEEE Global Communications Conference
Pagina's: 1 - 6
ISBN:9781479959525
Jaar van publicatie:2015
BOF-keylabel:ja
IOF-keylabel:ja
Authors from:Private, Higher Education
Toegankelijkheid:Closed