Method for linearsing high-frequency amplifier
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United States of America Patent
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Nov 11, 2003
Grant Date -
N/A
app pub date -
Jul 17, 2002
filing date -
Sep 14, 1999
priority date (Note) -
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Abstract
A predistorter is connected upstream of a high-frequency amplifier to be linearized. A predistortion factor is adaptively modified in the predistorter in such a way as to compensate non-linearities of the amplifier as well as possible. The quotient of the output signal of the high-frequency amplifier and the input signal of the predistorter is produced first. An average amplification is then determined based on the signal quotient. A correction term is produced for the predistortion factor, this correction term being dependent on the extent of the deviation of the average amplification from a set value. The predistortion factor is adaptively modified in such a way as to minimize the correction term.
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