Method and apparatus for tone tracking in wireless optical communication systems
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United States of America Patent
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Nov 19, 2002
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N/A
app pub date -
Jul 28, 2000
filing date -
Jul 28, 2000
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Abstract
A transmitted light signal, such as laser light, is modulated by a data signal and by a tracking signal. The tracking signal has a modulation depth that is substantially smaller than a peak-to-peak amplitude of the light signal. At reception, the tracking signal is recovered from the modulated light signal and is used to determine an orientation of a receiver with respect to the transmitted light signal.
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