Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal
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United States of America Patent
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Mar 23, 2010
Issued Date -
N/A
app pub date -
Oct 17, 2006
filing date -
Mar 16, 2006
priority date (Note) -
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Abstract
Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.
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