Method for tone hopping in a multipoint-to-point orthogonal frequency division multiplexing communication system
First Claim
1. A method for an orthogonal frequency division multiplexing multipoint-to-point communications system, the method comprising:
- 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 transmission from at least one tone to at least one other tone of the plurality of tones to reduce the impact of using any corrupted channels.
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Accused Products
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.
187 Citations
12 Claims
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1. A method for an orthogonal frequency division multiplexing multipoint-to-point communications system, the method comprising:
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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 transmission from at least one tone to at least one other tone of the plurality of tones to reduce the impact of using any corrupted channels. - View Dependent Claims (2)
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3. A method for an orthogonal frequency division multiplexing multipoint-to-point communications system, the method comprising:
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receiving an orthogonal frequency division multiplexing waveform at a multipoint-to-point host unit, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by the plurality of remote units; wherein each of the plurality of remote units is configured to modulate up to a plurality of tones with upstream information using orthogonal frequency division multiplexing; wherein each of the plurality of remote units is configured to adjust at least one characteristic of the plurality of tones such that when any tones are transmitted from at least two of the plurality of remote units, the orthogonality of the tones as received at the host unit is improved; and dynamically switching reception from at least one tone to at least one other tone of the plurality of tones to reduce the impact of any corrupted tones on upstream information transmitted by the plurality of remote units. - View Dependent Claims (4, 5, 6, 7)
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8. A method for an orthogonal frequency division multiplexing multipoint-to-point communications system, the method comprising:
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receiving an orthogonal frequency division multiplexing waveform at a multipoint-to-point host unit, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by a plurality of remote units; and transmitting up to a plurality of tones from a first remote unit of the plurality of remote units, 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 the plurality of remote units dynamically switching transmission between tones of the plurality of tones to reduce the impact of using any corrupted channels on the upstream information. - View Dependent Claims (9, 10, 11, 12)
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Specification