Offset-frequency loop-back calibration
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United States of America Patent
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Feb 2, 2010
Grant Date -
Mar 20, 2008
app pub date -
Sep 18, 2006
filing date -
Sep 18, 2006
priority date (Note) -
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Abstract
Embodiments of methods and means for calibrating a linearization characteristic within an RF transceiver system are provided. Such embodiments generally include extracting a portion of an output signal and frequency shifting or translating that signal by a predetermined value. The frequency shifted signal is then summed or otherwise introduced into a receiver signal pathway where it is analyzed by digital signal processing or other means to determine if linearization distortion is present. Linearization calibration of a power amplifier, a low-noise amplifier and/or other functionality within the system can then be performed in an automatic, reliable and ongoing manner.
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