SYSTEM FOR FOLLOW-UP SYNCHRONIZATION TO MAINTAIN SYNCHRONIZATION THROUGHOUT TRANSMISSION
First Claim
1. A bidirectional communication system, the system comprising:
- a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration;
wherein the first remote unit is configured to transmit up to a plurality of tones, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; and
wherein the first remote unit is configured to maintain the up to a plurality of tones substantially orthogonal with respect to any tones transmitted from at least one other remote unit of the plurality of remote units as received at the host unit through follow-up synchronization of the plurality of tones transmitted from the first remote unit.
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Accused Products
Abstract
A bidirectional communication system is provided. In one embodiment, a system comprises a host unit to communicate with a plurality of remote units using orthogonal frequency division multiplexing, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; the host unit receiving an orthogonal frequency division multiplexing waveform, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by the plurality of remote units; and wherein the host unit is configured to transmit adjustment information to a first remote unit of the plurality of remote units to maintain the plurality of tones transmitted by the plurality of remote units substantially orthogonal as received at the host unit, the information directing the first remote unit to adjust tones transmitted by the first remote unit.
99 Citations
18 Claims
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1. A bidirectional communication system, the system comprising:
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a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration; wherein the first remote unit is configured to transmit up to a plurality of tones, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; and wherein the first remote unit is configured to maintain the up to a plurality of tones substantially orthogonal with respect to any tones transmitted from at least one other remote unit of the plurality of remote units as received at the host unit through follow-up synchronization of the plurality of tones transmitted from the first remote unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bidirectional communication system, the system comprising:
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a host unit to communicate with a plurality of remote units using orthogonal frequency division multiplexing, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; the host unit receiving an orthogonal frequency division multiplexing waveform, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by the plurality of remote units; and wherein the host unit is configured to transmit follow-up synchronization information to a first remote unit of the plurality of remote units to maintain the plurality of tones transmitted by the plurality of remote units substantially orthogonal as received at the host unit, the information directing the first remote unit to adjust tones transmitted by the first remote unit. - View Dependent Claims (9, 10, 11, 12)
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13. A bi-directional communication system, the system comprising:
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a multipoint-to-point host unit; and a plurality of remote units communicatively coupled to the multipoint-to-point host unit through an orthogonal frequency division multiplexing waveform; wherein the multipoint-to-point host unit is configured to receive the orthogonal frequency division multiplexing waveform, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by the plurality of remote units; wherein the multipoint-to-point host unit is configured to update upstream synchronization parameters for at least one of the plurality of tones based on the received orthogonal frequency division multiplexing waveform to maintain the plurality of tones substantially orthogonal when received at the host unit. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification