Method for tone hopping in a multipoint-to-point orthogonal frequency division multiplexing communication system
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United States of America Patent
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Sep 2, 2008
Grant Date -
Aug 16, 2007
app pub date -
May 1, 2007
filing date -
Feb 6, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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; adjusting at least one characteristic of the plurality of tones such that when any tones are transmitted from the first remote unit and at least one other remote unit of the plurality of remote units, the orthogonality of the tones when received at the host unit is improved; and dynamically switching modulation between tones of the plurality of tones to reduce the impact of using any corrupted tones.
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