Adaptive subcarrier loading
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United States of America Patent
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Mar 23, 2010
Grant Date -
Aug 1, 2002
app pub date -
Nov 19, 2001
filing date -
Nov 20, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A wireless multicarrier transmission method wherein subcarriers of the transmission are adaptively modulated. The fading condition of each subcarrier is detected to generate fading channel profile information. Adaptive loading tables are calculated for lower, standard, and higher modulation schemes. One of the adaptive loading tables is selected and those subcarriers having low fading channel profile information are modulated with the lower modulation scheme, subcarriers having medium fading channel profile information are modulated with the standard modulation scheme, and subcarriers having high fading channel profile information are modulated with the higher modulation scheme.
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