Adaptive air interface waveform
First Claim
1. A system for generating an adaptive air interface waveform, the system comprising:
- an adaptive multi-carrier organization and signaling component operable to generate a waveform comprising a variable carrier frequency and variable bandwidth signal that comprises one or more subcarriers that are dynamically placeable over a range of frequencies, each subcarrier being separately modulated according to a direct sequence (DS) spread spectrum (SS) technique, the waveform having an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform; and
an adaptive multi-level bandwidth-efficient coding and modulation (BECM) component operable to adapt a modulation constellation, a code rate, and a code length of the generated waveform according to an available spectrum and one or more sub-carrier conditions.
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Abstract
In one embodiment, a method for generating an adaptive air interface waveform includes generating a waveform that includes a variable carrier frequency and variable bandwidth signal. The variable bandwidth signal includes one or more subcarriers that are dynamically placeable over a range of frequencies, and each subcarrier is separately modulated according to a direct sequence (DS) spread spectrum (SS) technique. The waveform has an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform. A modulation constellation, a code rate, and a code length of the generated waveform are adapted according to an available spectrum and one or more sub-carrier conditions.
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Citations
31 Claims
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1. A system for generating an adaptive air interface waveform, the system comprising:
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an adaptive multi-carrier organization and signaling component operable to generate a waveform comprising a variable carrier frequency and variable bandwidth signal that comprises one or more subcarriers that are dynamically placeable over a range of frequencies, each subcarrier being separately modulated according to a direct sequence (DS) spread spectrum (SS) technique, the waveform having an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform; and
an adaptive multi-level bandwidth-efficient coding and modulation (BECM) component operable to adapt a modulation constellation, a code rate, and a code length of the generated waveform according to an available spectrum and one or more sub-carrier conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating an adaptive air interface waveform, the method comprising:
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generating a waveform comprising a variable carrier frequency and variable bandwidth signal that comprises one or more subcarriers that are dynamically placeable over a range of frequencies, each subcarrier being separately modulated according to a direct sequence (DS) spread spectrum (SS) technique, the waveform having an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform; and
adapting a modulation constellation, a code rate, and a code length of the generated waveform according to an available spectrum and one or more sub-carrier conditions. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Software for generating an adaptive air interface waveform, the software embodied in media and when executed operable to:
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generate a waveform comprising a variable carrier frequency and variable bandwidth signal that comprises one or more subcarriers that are dynamically placeable over a range of frequencies, each subcarrier being separately modulated according to a direct sequence (DS) spread spectrum (SS) technique, the waveform having an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform; and
adapt a modulation constellation, a code rate, and a code length of the generated waveform according to an available spectrum and one or more sub-carrier conditions. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A system for generating an adaptive air interface waveform, the system comprising:
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means for generating a waveform comprising a variable carrier frequency and variable bandwidth signal that comprises one or more subcarriers that are dynamically placeable over a range of frequencies, each subcarrier being separately modulated according to a direct sequence (DS) spread spectrum (SS) technique, the waveform having an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform; and
means for adapting a modulation constellation, a code rate, and a code length of the generated waveform according to an available spectrum and one or more sub-carrier conditions.
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Specification