Predistortion device based on vector envelope injection and the method thereof
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United States of America Patent
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Jul 13, 2010
Grant Date -
Jul 10, 2008
app pub date -
Jan 25, 2005
filing date -
Jan 25, 2005
priority date (Note) -
Expired
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Abstract
The present invention discloses a predistortion method based on vector envelope injection. The method includes the following steps: radio frequency input signals are divided into two signal streams; one input signal stream generates two envelope injection signals whose amplitudes can be adjusted independently; the other signal stream is divided into further two radio frequency signal streams; the two radio frequency signal streams are amplified with the same amplitude; frequency mixing is performed for the two envelope injection signals and two radio frequency signal streams respectively to obtain two compensation signals; the amplified radio frequency signal and compensation signals are power synthesized in the same way, so as to obtain two compensation signals and amplified radio frequency signals of different directions. This present invention also provides a corresponding predistortion device.
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