The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2012
Filed:
Oct. 11, 2006
Boris Dortschy, Hägersten, SE;
Jaume Rius I Riu, Vällingby, SE;
Moraes Rodrigo Bastos, Belem, BR;
Aldebaro Klautau, Belem, BR;
Ronaldo Zampolo, Belem, BR;
Boris Dortschy, Hägersten, SE;
Jaume Rius i Riu, Vällingby, SE;
Moraes Rodrigo Bastos, Belem, BR;
Aldebaro Klautau, Belem, BR;
Ronaldo Zampolo, Belem, BR;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method and transmitter unit in a multi-tone multi-line based transmission system such as a digital subscriber line system for determining a Power Spectral Density (PSD) of a plurality of users over a physical channel for at least one tone. Each of the users has a minimum required data rate and a maximum allowed power. A Power Minimization Problem (PMP) is formulated mathematically introducing Lagrangian multipliers and by utilizing a dual decomposition approach for the objective function of the PMP in order to solve the PMP on a per-tone basis.