Adaptive air interface waveform
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United States of America Patent
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-
Jan 25, 2005
Grant Date -
Oct 30, 2003
app pub date -
Apr 22, 2003
filing date -
Apr 25, 2002
priority date (Note) -
In Force
status (Latency Note)
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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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