Method and system for adaptive modulation
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United States of America Patent
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Nov 24, 2009
Grant Date -
Aug 23, 2007
app pub date -
May 9, 2007
filing date -
Feb 6, 1995
priority date (Note) -
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Abstract
Systems and methods for an orthogonal frequency division multiplexing multipoint-to-point communications system are provided. In one embodiment, a method comprises establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; transmitting up to a plurality of tones from the first remote unit, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; modulating the up to a plurality of tones using a first modulation scheme when transmitting a first type of upstream information; and modulating the up to a plurality of tones using a second modulation scheme when transmitting a second type of upstream information.
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