Method and system for providing phase reference signal
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United States of America Patent
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Dec 10, 2013
Grant Date -
Sep 27, 2012
app pub date -
Mar 25, 2011
filing date -
Mar 25, 2011
priority date (Note) -
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Abstract
A method and system of providing a phase reference signal includes generating a reference signal having a reference frequency, modulating the reference signal at a modulation frequency lower than the reference frequency to obtain a modulated drive signal, receiving the modulated drive signal at a phase reference, and generating the phase reference signal based on the modulated drive signal. The phase reference signal including multiple reference tones having corresponding tone frequencies clustered around multiples of the reference frequency. A spacing between adjacent tones of the multiple reference tones is the same as the modulation frequency or an integer multiple of the modulation frequency.
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