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Section division operating point determination method for multicarrier communication systems

  • US 6,400,773 B1
  • Filed: 06/04/1999
  • Issued: 06/04/2002
  • Est. Priority Date: 06/04/1999
  • Status: Expired due to Term
First Claim
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1. 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 λ

    data correlating bit rate to allocated power for a plurality of subchannels;

    choosing a starting value of λ

    , and high and low values surrounding λ

    ;

    evaluating λ

    to determine its performance based upon stored allocated performance quantity data;

    updating λ

    with a section search that alters one of the high and low values to converge toward λ

    ;

    repeating said steps of updating and evaluating until one of the following conditions is demonstrated by said step of evaluating, (a) a newly chosen λ

    meets a performance quantity budget indicated by said performance quantity data;

    (b) a newly chosen λ

    equals a previous high or low value for λ

    , or (c) a predetermined number of updates have been conducted; and

    allocating a performance quantity based upon the λ

    meeting a condition defined in said step of repeating.

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