RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM
First Claim
Patent Images
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 using orthogonal frequency division multiplexing; and
adjusting a round trip path delay associated with the first remote unit.
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Abstract
A bidirectional communication system is provided. In one embodiment, a method for an orthogonal frequency division multiplexing multipoint-to-point communications system 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 using orthogonal frequency division multiplexing; and adjusting a round trip path delay associated with the first remote unit.
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Citations
15 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 using orthogonal frequency division multiplexing; and
adjusting a round trip path delay associated with the first remote unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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;
receiving at least one ranging signal at the multipoint-to-point host unit, the at least one ranging signal transmitted from at least one of the plurality of remote units;
estimating at least one round trip path delay based on the at least one ranging signal; and
adjusting the at least one round trip path delay between the multipoint-to-point host unit and the at least one of the plurality of remote units. - View Dependent Claims (10, 11, 12)
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13. 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;
receiving a round trip delay adjustment based on an estimated round trip delay period between the first remote unit and the host unit; and
delaying transmission of up to a plurality of tones from the first remote unit based on the round trip delay adjustment, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing. - View Dependent Claims (14, 15)
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Specification