System for oderwire modulation
First Claim
1. A bidirectional communication system, the system comprising:
- 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 each of the plurality of remote units simultaneously share an orthogonal frequency division multiplexing (OFDM) waveform having adjacent spectrally overlapping carriers by transmitting information on distinct tones of the OFDM waveform;
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 modulate at least one tone of the up to a plurality of tones with payload data using a first modulation scheme, and modulate at least one tone of the up to a plurality of tones with control data using a second modulation scheme, the second scheme more robust than the first modulation scheme.
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Accused Products
Abstract
Systems for orderwire modulation are provided. In one embodiment, a bidirectional communication system comprises 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 modulate at least one tone of the up to a plurality of tones with payload data using a first modulation scheme, and modulate at least one tone of the up to a plurality of tones with control data using a second modulation scheme, the second scheme more robust than the first modulation scheme.
189 Citations
16 Claims
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1. A bidirectional communication system, the system comprising:
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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 each of the plurality of remote units simultaneously share an orthogonal frequency division multiplexing (OFDM) waveform having adjacent spectrally overlapping carriers by transmitting information on distinct tones of the OFDM waveform; 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 modulate at least one tone of the up to a plurality of tones with payload data using a first modulation scheme, and modulate at least one tone of the up to a plurality of tones with control data using a second modulation scheme, the second scheme more robust than the first modulation scheme. - 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 (OFDM), wherein each of the plurality of remote units simultaneously share an OFDM waveform having adjacent spectrally overlapping carriers by transmitting information on distinct tones of the OFDM waveform, 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 demodulate payload data from at least one tone of the plurality of tones based on a first modulation scheme, and demodulate control data from at least one tone of the plurality of tones based on a second modulation scheme. - View Dependent Claims (9, 10, 11, 12, 13)
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14. 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 (OFDM) waveform having adjacent spectrally overlapping carriers, wherein each of the plurality of remote units simultaneously share the OFDM waveform by transmitting information on distinct tones of the OFDM waveform; wherein the multipoint-to-point host unit is configured to receive the OFDM waveform, the OFDM waveform comprising a plurality of tones transmitted by the plurality of remote units; wherein the plurality of remote units are configured to modulate at least one tone of the plurality of tones using a first modulation scheme for transmitting payload data, and modulate at least one tone of the plurality of tones using a second modulation scheme for transmitting control data. - View Dependent Claims (15, 16)
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Specification