Patent ID: 6400773
Filing Date: 2002-06-04
Classification: H04L

Abstract:
A method for allocating transmission performance quantities among discrete multicarrier modulation communication channels, the method comprising steps of:determining and storing a set of Lagrange multiplier &lgr; data correlating bit rate to allocated power for a plurality of subchannels; choosing a starting value of &lgr;, and high and low values surrounding &lgr;; evaluating &lgr; to determine its performance based upon stored allocated performance quantity data; updating &lgr; with a section search that alters one of the high and low values to converge toward &lgr;; repeating said steps of updating and evaluating until one of the following conditions is demonstrated by said step of evaluating, (a) a newly chosen &lgr; meets a performance quantity budget indicated by said performance quantity data; (b) a newly chosen &lgr; equals a previous high or low value for &lgr;, or (c) a predetermined number of updates have been conducted; and allocating a performance quantity based upon the &lgr; meeting a condition defined in said step of repeating.